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WO2016033931A1 - 显示面板及其制备方法和显示装置 - Google Patents

显示面板及其制备方法和显示装置 Download PDF

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Publication number
WO2016033931A1
WO2016033931A1 PCT/CN2015/071095 CN2015071095W WO2016033931A1 WO 2016033931 A1 WO2016033931 A1 WO 2016033931A1 CN 2015071095 W CN2015071095 W CN 2015071095W WO 2016033931 A1 WO2016033931 A1 WO 2016033931A1
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WO
WIPO (PCT)
Prior art keywords
water blocking
layer
display device
display panel
regions
Prior art date
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Ceased
Application number
PCT/CN2015/071095
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English (en)
French (fr)
Inventor
孙韬
王涛
张嵩
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Application filed by BOE Technology Group Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US14/768,251 priority Critical patent/US9614185B2/en
Priority to EP15749711.6A priority patent/EP3190624B1/en
Publication of WO2016033931A1 publication Critical patent/WO2016033931A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H10K59/8731—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
    • 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
    • H10K50/8445—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • 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

Definitions

  • the present invention relates to the field of flexible display technologies, and in particular, to a display panel, a method for fabricating the same, and a display device.
  • the organic light-emitting device OLED Organic Light-Emitting Diode
  • OLED Organic Light-Emitting Diode
  • An OLED device generally includes an anode, a cathode, a light-emitting layer, a hole transport layer, and an electron transport layer.
  • the applied voltage energy drives electrons and holes to be injected into the electron transport layer and the hole from the cathode and the anode, respectively.
  • Transport layer The two meet and combine in conduction, forming a so-called electron-hole recombination, producing photons.
  • the anode and cathode electrons combine in the luminescent layer to produce light.
  • the life of OLED devices has constrained the pace of industrialization.
  • electrons are injected from the cathode to the electron transport layer.
  • the cathode of the OLED adopts a material close to the work function of the light-emitting layer to reduce the energy level barrier.
  • Low work function materials such as magnesium, aluminum, silver, etc.
  • the hole transport layer and the electron transport layer are easily corroded by water and oxygen, resulting in pixel damage and shortened device life. Therefore, the packaging technology of OLED devices is particularly important. An effective package prevents moisture and oxygen from entering, prevents aging of organic materials, and extends the life of OLED devices.
  • the packaging of OLED devices mainly includes two types of cover type packages and thin film packages.
  • the cover type package mainly adopts the glass cover material, the thickness is large, and the package is relatively strict, but the glass cover package is difficult to meet the bending resistance of the flexible OLED device.
  • the film package is mainly made of film material. The thickness is small and the flexibility is good, so the thin film material is often used to realize the packaging of the flexible OLED device. Thin film packages include single-layer thin film packages and multilayer thin film packages.
  • the flexible OLED device 6 In order to achieve a packaging effect comparable to that of glass cover packages, flexible OLED devices typically employ a multilayer film package structure. As shown in FIG. 1, the flexible OLED device 6 generally employs a multilayer film package structure in which an inorganic material film layer 4 and an organic material film layer 5 are alternately stacked.
  • the inorganic material film layer 4 can prevent moisture in the external environment from intruding into the interior of the flexible OLED device 6.
  • the organic material film layer 5 has better flexibility and can enhance the overall flexibility of the multilayer package film.
  • the package structure of the multilayer film usually has a large thickness (up to several micrometers), and the inorganic material film layer 4 is easily broken when the flexible OLED display device is bent due to stress and defects.
  • the inorganic material film layer 4 is easily broken when the flexible OLED display device is bent due to stress and defects.
  • cracks or small holes existing inside the inorganic material film layer 4 and stress matching with the adjacent organic material film layer 5 are not properly matched, when the package structure is bent with the flexible OLED display device, It is easy to cause the inorganic material film layer 4 to be broken along the position of defects such as cracks or small holes, which makes the bending resistance of the flexible OLED display device package portion poor.
  • the object of the present invention is to provide a display panel, a method for fabricating the same, and a display device according to the above technical problems existing in the prior art.
  • the stress of the first water blocking layer at the defect position along the crack or the small hole can be dispersed, thereby blocking the fracture path of the first water blocking layer and improving the bending resistance of the display panel. Fold performance.
  • a display panel including a first substrate, a display device disposed on the first substrate, and a package structure for packaging a display device on the first substrate, the package structure Including at least two first water blocking layers and at least one planarization layer, the first water blocking layer and the planarization layer are alternately stacked over the display device in turn, each of the first water blocking layers A plurality of first regions and a plurality of second regions are included, and seam lines of the first ones and the second regions of any two of the first water blocking layers are offset from each other.
  • the plurality of first regions and the plurality of second regions are alternately arranged in a row and column direction.
  • an area of the first water blocking layer remote from the display device is larger than an area of the first water blocking layer adjacent to the display device.
  • an area of the planarization layer away from the display device is larger than that of the first water blocking layer adjacent to the display device An area; an area of the planarization layer adjacent to the display device is smaller than an area of the first water blocking layer remote from the display device.
  • the thickness of the planarization layer is greater than the thickness of the first water blocking layer.
  • the first water blocking layer is made of an inorganic material
  • the planarizing layer is made of an organic material
  • the package structure further comprises at least one second water blocking layer, the second water blocking layer is overlaid on the display device, and the second water blocking layer is made of an inorganic material.
  • a display device comprising any one of the above display panels.
  • a method of manufacturing a display panel including:
  • Forming the package structure includes forming at least two first water blocking layers and at least one planarization layer, wherein the at least two first water blocking layers and the at least one planarization layer are sequentially alternately formed over the display device And each of the first water blocking layers includes a plurality of first regions and a plurality of second regions, and the first regions and the second regions of any two of the first water blocking layers The seam lines are staggered from each other.
  • the forming the first water blocking layer specifically includes:
  • Step S1 arranging a first mask having a first area pattern, wherein the first area pattern corresponds to an area where the plurality of first areas are to be formed;
  • Step S2 depositing the plurality of first regions forming the first water blocking layer
  • Step S3 arranging a second mask having a second area pattern, wherein the second area pattern corresponds to an area where the plurality of second areas are to be formed;
  • Step S4 depositing the plurality of second regions forming the first water blocking layer.
  • the first region and the second region are formed by physical sputtering deposition or chemical vapor deposition.
  • planarization layer specifically includes:
  • Step S5 arranging a third mask having a planarization layer pattern corresponding to a region where the planarization layer is to be formed;
  • Step S6 forming the planarization layer by coating, printing or chemical vapor deposition
  • Step S7 curing the planarization layer by heating or LED blue light irradiation.
  • each of the first water blocking layers is divided into a plurality of first regions and a plurality of Two regions, and the seam lines of the first region and the second region of any two first water blocking layers are staggered from each other, so that the first water blocking layer is in a defect along the crack or the small hole when the display panel is bent
  • the stress applied to the position can be dispersed, thereby blocking the fracture path of the first water blocking layer and improving the bending resistance of the display panel.
  • the display device provided by the present invention improves the bending resistance of the display device by using the above display panel.
  • FIG. 1 is a schematic structural view of a display panel in the prior art
  • FIG. 2 is a schematic structural diagram of a display panel according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural view of a first water blocking layer in the display panel shown in FIG. 2;
  • FIG. 4 is a schematic structural diagram of a display panel according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural view of a first water blocking layer in the display panel shown in FIG. 4;
  • FIG. 6 is a schematic structural diagram of a display panel according to Embodiment 3 of the present invention.
  • a display panel including a first substrate 1, a display device 2 disposed on the first substrate 1, and a package for mounting the display device 2 on the first substrate 1.
  • Package structure 3 includes at least two first water blocking layers 31 and at least one planarization layer 32.
  • the first water blocking layer 31 and the planarization layer 32 are sequentially alternately stacked over the display device 2, and each of the first water blocking layers 31 is provided.
  • Each includes a plurality of first regions 311 and a plurality of second regions 312, and the seam lines 313 of the first region 311 and the second region 312 of any two of the first water blocking layers 31 are offset from each other.
  • the display panel can disperse the stress of the first water blocking layer 31 at a defect position such as a crack or a small hole when bending, thereby blocking the fracture path of the first water blocking layer 31 and improving the display.
  • the bending resistance of the panel is a defect position such as a crack or a small hole when bending.
  • the package structure 3 includes three first water blocking layers 31 and two planarization layers 32.
  • the display device 2 is an OLED display device, and the display panel of the OLED display device can be flexibly bent.
  • the first region 311 and the second region 312 are alternately distributed in the row and column directions. Specifically, a first area 311 and a second area 312 are included in the row direction, and a first area 311 and a second area 312 are also included in the column direction.
  • the arrangement is such that when the display panel is bent, the stress of each of the first water blocking layers 31 in the direction of rows and columns can be better dispersed, so that the stress received by the entire first water blocking layer 31 becomes Evenly, the entire first water blocking layer 31 is not easily broken at any position, and the bending resistance of the display panel is improved.
  • the area of the first water blocking layer 31 away from the display device 2 is larger than the proximity display device.
  • the area of the first water blocking layer 31 of 2 i.e., the first water blocking layer located below. That is, the first water blocking layer 31 remote from the display device 2 can completely cover the first water blocking layer 31 close to the display device 2.
  • the first water blocking layer 31 thus disposed can form a multilayer package for the display device 2, thereby better preventing the outside water vapor and oxygen from intruding into the interior of the display panel and causing damage to the display panel.
  • any adjacent planarization layer 32 and first water blocking layer 31 if the planarization layer 32 is above the first water blocking layer 31 (ie, the planarization layer 32 is larger than the first water blocking layer 31) Further away from the display device 2), the area of the planarization layer 32 is larger than the area of the first water blocking layer 31; if the planarization layer 32 is below the first water blocking layer 31 (ie, the planarization layer 32 is more than the first water blocking layer) The layer 31 is closer to the display device 2), and the area of the planarization layer 32 is smaller than the area of the first water blocking layer 31.
  • the adjacent planarization layer 32 and the first water blocking layer 31 can be closely coated with each other, and at the same time, since the first water blocking layer 31 has a function of preventing the outside water vapor and oxygen from intruding into the interior of the display panel,
  • the planarization layer 32 has both good flexibility and a flatness between the layers of the encapsulation film layer. Therefore, the above package structure can not only encapsulate the OLED display device well, but also prevent external water vapor and oxygen. The intrusion can also prevent the first water blocking layer 31 from being easily broken, thereby improving the bending resistance of the display panel.
  • the area of the relatively upper planarization layer 32 may also be less than or equal to The area of the first water blocking layer 31 (i.e., close to the first water blocking layer 31 of the display device 2) is relatively lower, as long as the planarization layer 32 is ensured to make the layer between the layers of the encapsulating film layer more flat. In this case, the first water blocking layer 31 can also be made less likely to break.
  • the thickness of the planarization layer 32 is preferably greater than the thickness of the adjacent first water blocking layer 31.
  • the first water blocking layer 31 is made of an inorganic material
  • the planarizing layer 32 is made of an organic material.
  • the planarization layer 32 formed of the organic material has good flexibility.
  • the thicker planarization layer 32 enables a more flat layer between the layers of the encapsulation film layer. Since the first water blocking layer 31 formed of the inorganic material is thin, the first water blocking layer 31 is not easily broken.
  • by adhering a flattening layer 32 having a large thickness above or below each of the first water-blocking layers 31 having a small thickness the respective first water-blocking layers 31 can be made more difficult to be broken, thereby further improving.
  • the bending resistance of the display panel is preferably greater than the thickness of the adjacent first water blocking layer 31.
  • the thickness of the planarization layer 32 can also be less than or equal to the thickness of the adjacent first water blocking layer 31, which can also make the first water blocking layer 31 not easily broken, thereby improving the bending resistance of the display panel. Fold performance.
  • the embodiment further provides a method for fabricating the above display panel, comprising: forming a display device on the first substrate; and forming a package structure over the first substrate on which the display device is formed.
  • Forming the package structure includes forming at least two first water blocking layers and at least one planarization layer, wherein the first water blocking layer and the planarization layer are sequentially alternately formed over the display device, and each of the first water blocking layers includes a plurality of The first region and the plurality of second regions, and the seam lines of the first region and the second region of any two first water blocking layers are offset from each other.
  • forming the first water blocking layer specifically includes steps S1 to S4.
  • Step S1 arranging a first mask having a first area pattern disposed above the first substrate such that the first area pattern corresponds to an area where the plurality of first areas are to be formed.
  • the first region pattern in the first mask is an opening disposed in the first mask corresponding to the pattern of the first region in the first water blocking layer, and the other regions except the opening are uniform in thickness Mask plate.
  • the first region pattern in the form of an opening facilitates subsequent formation of the first region by one-step deposition.
  • Step S2 depositing a plurality of first regions forming the first water blocking layer.
  • the first region is formed by physical sputtering deposition or chemical vapor deposition.
  • the first region is directly deposited in the opening of the first mask (ie, the first region pattern), and is free from any other process.
  • Step S3 disposing a second mask having a second area pattern on the first substrate subjected to the foregoing steps, so that the second area pattern and the plurality of patterns to be formed are The areas of the second area correspond to each other.
  • the second area pattern in the second mask is an opening in the second mask corresponding to the pattern of the second area in the first water blocking layer, and the area other than the opening is uniform in thickness Mask plate.
  • the second area pattern in the form of an opening facilitates subsequent formation of the second area by one-step deposition.
  • Step S4 depositing a plurality of second regions forming the first water blocking layer.
  • the second region is formed by physical sputtering deposition or chemical vapor deposition.
  • the second region is directly deposited in the opening of the second mask (ie, the second region pattern) without any other process, which is very simple.
  • a first water blocking layer is prepared.
  • a planarization layer is formed on the first water blocking layer, and the forming the planarization layer comprises:
  • Step S5 arranging a third mask plate having a planarization layer pattern on the first substrate on which the foregoing steps are completed, such that the planarization layer pattern corresponds to a region where the planarization layer is to be formed.
  • the planarization layer pattern in the third mask is an opening corresponding to the pattern of the planarization layer in the third mask, and the other region than the opening is a mask having a uniform thickness.
  • the planarization layer pattern in the form of an opening facilitates subsequent formation of a planarization layer by a one-step deposition, printing or coating process.
  • Step S6 forming a planarization layer by coating, printing or chemical vapor deposition.
  • planarization layer is directly deposited or coated in the opening of the third mask (ie, the planarization layer pattern), and no other process is required, which is very simple.
  • planarization layer can also be formed by a screen printing method.
  • Step S7 The planarization layer is cured by heating or LED blue light irradiation.
  • steps S1 to S4 and steps S5 to S7 may be alternately repeated until all of the first water blocking layer and the planarizing layer are completed. So far, the package structure of the OLED display device is completed, and the package of the OLED display device is completed, and at the same time, the preparation of the entire OLED display panel is completed.
  • the first region patterns of the first mask used are different, and the second region pattern of the second mask used is formed. They are also different, such that the seam lines of the first region and the second region of any two first water blocking layers are offset from each other, and the area of the first water blocking layer away from the display device is larger than that of the first display device. The area of the water blocking layer.
  • planarization layer patterns of the third mask used may also be different.
  • the first water blocking layer has a function of preventing moisture and oxygen from the outside from intruding into the interior of the display panel, preferably, the first water blocking layer has one more layer than the planarizing layer, so that Ensure that the outermost layer of the package structure is the first water blocking layer.
  • the preparation method of the above display panel is simple in process, and can ensure that each of the first water blocking layers is not easily broken, thereby improving the bending resistance of the display panel, and improving the preparation efficiency of the display panel.
  • the present embodiment provides a display panel. As shown in FIGS. 4 and 5, in each of the first water blocking layers 31, the first region 311 and the second region 312 are alternately arranged in the direction of rows and columns. Different from Embodiment 1, a plurality of first regions 311 and a plurality of second regions 312 are specifically included in the direction of rows and columns.
  • the number of the first region 311 and the second region 312 included in the direction of the row or column may not be equal, as long as the plurality of first regions 311 and The plurality of second regions 312 may be alternately arranged.
  • the number of the first regions 311 may be one or more less than the number of the second regions 312.
  • the number of the first region 311 or the second region 312 included in the row direction may be different from the number of the first region 311 or the second region 312 included in the column direction, in the row (or column) direction.
  • the number of the first area 311 and the second area 312 may be determined according to the size of the display panel and the size of the first area 311 and the second area 312, which are not specifically limited herein.
  • the sizes of the plurality of first regions 311 (or the plurality of second regions 312) in each of the first water blocking layers 31 may be equal or unequal as long as any two of the first water blocking layers 31 can be secured.
  • the seam lines 313 of the first region and the second region may be shifted from each other.
  • the embodiment provides a display panel.
  • the package structure of the embodiment further includes at least one second water blocking layer, and the second water blocking layer is overlaid on the display device.
  • the second water blocking layer is made of an inorganic material.
  • the package structure includes a second water blocking layer 33, and the second water blocking layer 33 is overlaid on the outermost layer above the display device 2 (ie, at the outermost layer of the package structure). . More specifically, the second water blocking layer 33 is overlaid on the first water blocking layer 31 farthest from the display device 2.
  • the arrangement of the second water blocking layer 33 can further prevent moisture in the external environment.
  • the inside of the display device 2 is invaded by the seam line 313 between the first region 311 and the second region 312 in the first water blocking layer 31, thereby better protecting the display device 2.
  • the second water blocking layer 33 may be overlapped at any position above the display device 2, such as disposed close to the display device 2, or overlying the outermost layer of the display device 2 (as shown in FIG. 6). Or sandwiched between the first water blocking layer 31 and the planarization layer 32.
  • the second water blocking layer 33 may also be plural.
  • the area of the second water blocking layer 33 is not limited, and the second water blocking layer 33 preferably covers all the seam lines 313 in the first water blocking layer 31 adjacent thereto.
  • Embodiments 1-3 By separating each of the first water blocking layers into the first region and the second region, and making the seam lines of the first region and the second region of any two first water blocking layers offset from each other, the display panel can be When bending, the stress of the first water blocking layer at the defect position along the crack or the small hole can be dispersed, thereby blocking the fracture path of the first water blocking layer and improving the bending resistance of the display panel.
  • the embodiment provides a display device including the display panel in any one of embodiments 1-3.
  • the bending resistance of the display device is improved.
  • the display device may be any product or component having a display function such as an electronic paper, an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as an electronic paper, an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.

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  • Chemical & Material Sciences (AREA)
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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

提供一种显示面板及其制备方法和显示装置。该显示面板包括第一基板（1）、设置在第一基板上的显示器件（2）和用于对第一基板上的显示器件进行封装的封装结构（3），封装结构包括至少两个第一阻水层（31）和至少一个平坦化层（32），第一阻水层和平坦化层依次交错覆叠在显示器件上方，每个第一阻水层都包括多个第一区域（311）和多个第二区域（312），任意两个第一阻水层的第一区域和第二区域的接缝线（313）相互错开设置。

Description

显示面板及其制备方法和显示装置 技术领域
本发明涉及柔性显示技术领域，具体地，涉及一种显示面板及其制备方法和显示装置。
背景技术
有机电致发光器件OLED(Organic Light-Emitting Diode)被认为是最有发展潜力的平板显示器件，同时被认为最有可能制作成柔性显示器件。
OLED器件通常包括阳极、阴极、发光层、空穴传输层和电子传输层，当电力供应至适当电压时，外加的电压能量将驱动电子与空穴分别由阴极和阳极注入电子传输层和空穴传输层。两者在传导中相遇、结合，即形成所谓的电子-空穴复合，产生光子。阳极空穴与阴极电子会在发光层中结合，产生光亮。
目前，OLED器件的寿命问题制约了其产业化步伐。当OLED器件工作时从阴极注入电子到电子传输层，为了提高注入的载流子数量，提高发光效率，OLED的阴极采用与发光层相近功函数的材料，以减少能级势垒，而这种低功函数的材料(如镁、铝、银等)都为活泼金属材料，极易与外界环境中的水氧发生反应，使OLED器件失效。同时空穴传输层和电子传输层，很容易受到水氧的侵蚀，导致像素受损，器件寿命缩短。所以，OLED器件的封装技术显得尤为重要。有效的封装可以防止水汽和氧气的侵入，防止有机材料老化，延长OLED器件寿命。
在实际工作时，阴极被腐蚀10％就会严重影响OLED器件的工作，同样，柔性OLED器件也必须进行封装。目前，OLED器件的封装主要有盖板式封装和薄膜封装两种。盖板式封装主要采用玻璃盖板材料，厚度较大，封装较严实，但玻璃盖板封装很难满足柔性OLED器件的耐弯折特性。薄膜封装主要采用薄膜材料， 厚度较小，柔韧性较好，所以薄膜材料常用于实现柔性OLED器件的封装。薄膜封装包括单层薄膜封装和多层薄膜封装，为了达到与玻璃盖板封装相当的封装效果，柔性OLED器件通常采用多层薄膜的封装结构。如图1所示，柔性OLED器件6通常采用无机材料膜层4和有机材料膜层5交替覆叠的多层薄膜封装结构。无机材料膜层4能够防止外界环境中的水汽侵入柔性OLED器件6内部，有机材料膜层5柔韧性较好，能够增强多层封装薄膜的整体柔韧性。
多层薄膜的封装结构通常具有较大的厚度(能达到数微米)，由于应力及缺陷的影响，当柔性OLED显示器件发生弯曲时，无机材料膜层4容易发生断裂。如通常由于无机材料膜层4内部存在的裂纹或小孔，以及与相邻的有机材料膜层5相接触时的应力匹配不适当的问题，当封装结构随着柔性OLED显示器件发生弯曲时，很容易使无机材料膜层4沿着缺陷(如裂纹或小孔)位置发生断裂，这使得柔性OLED显示器件封装部分的耐弯折性能很差。
发明内容
本发明的目的是针对现有技术中存在的上述技术问题，提供一种显示面板及其制备方法和显示装置。该显示面板在弯折时，第一阻水层在沿裂纹或小孔等缺陷位置受到的应力能够分散开来，从而阻断了第一阻水层的断裂路径，提高了显示面板的耐弯折性能。
根据本发明的一个方面，提供了一种显示面板，其包括第一基板、设置在第一基板上的显示器件和用于对第一基板上的显示器件进行封装的封装结构，所述封装结构包括至少两个第一阻水层和至少一个平坦化层，所述第一阻水层和所述平坦化层依次交替覆叠在所述显示器件上方，每个所述第一阻水层都包括多个第一区域和多个第二区域，任意两个所述第一阻水层中的所述第一区域和所述第二区域的接缝线相互错开。
优选地，在每个所述第一阻水层中，所述多个第一区域和所述多个第二区域在行和列方向上均交替设置。
优选地，对于任意相邻的两个所述第一阻水层，远离所述显示器件的所述第一阻水层的面积大于靠近所述显示器件的所述第一阻水层的面积。
优选地，对于任意相邻的所述平坦化层和所述第一阻水层，远离所述显示器件的所述平坦化层的面积大于靠近所述显示器件的所述第一阻水层的面积；靠近所述显示器件的所述平坦化层的面积小于远离所述显示器件的所述第一阻水层的面积。
优选地，所述平坦化层的厚度大于所述第一阻水层的厚度。
优选地，所述第一阻水层采用无机材料，所述平坦化层采用有机材料。
优选地，所述封装结构还包括至少一个第二阻水层，所述第二阻水层覆叠在所述显示器件上方，所述第二阻水层采用无机材料。
根据本发明的另一方面，提供了一种显示装置，其包括上述任意一种显示面板。
根据本发明的又一方面，还提供一种显示面板的制备方法，其包括：
在第一基板上形成显示器件；以及
在所述显示器件上方形成封装结构，
其中形成所述封装结构包括形成至少两个第一阻水层和至少一个平坦化层，所述至少两个第一阻水层和所述至少一个平坦化层依次交替形成于所述显示器件上方，并且每个所述第一阻水层均包括多个第一区域和多个第二区域，且任意两个所述第一阻水层中的所述第一区域和所述第二区域的接缝线相互错开。
优选地，形成所述第一阻水层具体包括：
步骤S1：布置开设有第一区域图案的第一掩模板,所述第一区域图案与将要形成所述多个第一区域的区域对应；
步骤S2：沉积形成所述第一阻水层的所述多个第一区域；
步骤S3：布置开设有第二区域图案的第二掩模板,所述第二区域图案与将要形成所述多个第二区域的区域对应；
步骤S4：沉积形成所述第一阻水层的所述多个第二区域。
优选地，所述第一区域和所述第二区域采用物理溅射沉积或化学气相沉积的方法形成。
优选地，形成所述平坦化层具体包括：
步骤S5：布置开设有平坦化层图案的第三掩模板,所述平坦化层图案与将要形成所述平坦化层的区域对应；
步骤S6：采用涂敷、打印或化学气相沉积的方法形成所述平坦化层；以及
步骤S7：通过加热或LED蓝光照射的方法对所述平坦化层进行固化。
在本发明所提供的显示面板或通过使用本发明所提供的显示面板的制备方法而至制造的显示面板中，通过将每个第一阻水层都分隔成多个第一区域和多个第二区域，并使任意两个第一阻水层的第一区域和第二区域的接缝线相互错开，能使显示面板在弯折时，第一阻水层在沿裂纹或小孔等缺陷位置受到的应力能够分散开来，从而阻断了第一阻水层的断裂路径，提高了显示面板的耐弯折性能。
本发明所提供的显示装置，通过采用上述显示面板，提高了显示装置的耐弯折性能。
附图说明
图1为现有技术中显示面板的结构示意图；
图2为本发明实施例1提供的显示面板的结构示意图；
图3为图2所示显示面板中的第一阻水层的结构示意图；
图4为本发明实施例2提供的显示面板的结构示意图；
图5为图4所示显示面板中的第一阻水层的结构示意图；以及
图6为本发明实施例3提供的显示面板的结构示意图。
具体实施方式
为使本领域的技术人员更好地理解本发明的技术方案，下面结合附图和具体实施方式对本发明所提供的一种显示面板及其制备方法和显示装置作进一步详细描述。
根据本发明的实施例提供一种显示面板，如图2所示，包括第一基板1、设置在第一基板1上的显示器件2和用于对第一基板1上的显示器件2进行封装的封装结构3。封装结构3包括至少两个第一阻水层31和至少一个平坦化层32，第一阻水层31和平坦化层32依次交替覆叠在显示器件2上方，每个第一阻水层31都包括多个第一区域311和多个第二区域312，任意两个第一阻水层31中的第一区域311和第二区域312的接缝线313相互错开设置。
如此设置，能使显示面板在弯折时，能够分散第一阻水层31在沿裂纹或小孔等缺陷位置受到的应力，从而阻断了第一阻水层31的断裂路径，提高了显示面板的耐弯折性能。
实施例1：本实施例中，封装结构3包括三个第一阻水层31和两个平坦化层32。显示器件2为OLED显示器件，OLED显示器件的显示面板能够柔性弯折。
本实施例中，如图3所示，在每个第一阻水层31中，第一区域311和第二区域312在行和列方向上均交替分布。具体地,在行方向上包括一个第一区域311和一个第二区域312，在列方向上也包括一个第一区域311和一个第二区域312。如此设置，使得显示面板在进行弯折时，能够较好地分散每个第一阻水层31在行和列的方向上受到的应力，从而使整个第一阻水层31受到的应力变得均匀，进而使整个第一阻水层31在任意位置都不容易发生断裂，提高了显示面板的耐弯折性能。
本实施例中，对于任意相邻的两个第一阻水层31，远离显示器件2的第一阻水层31(即，处于相对上方的第一阻水层31)的面积大于靠近显示器件2的第一阻水层31(即，处于相对下方的第一阻水层)的面积。即远离显示器件2的第一阻水层31能够将靠近显示器件2的第一阻水层31完全包覆。如此设置的第一阻水层31，能够对显示器件2形成多层封装，从而更好地避免外界的水汽和氧气侵入显示面板内部，对显示面板造成损坏。
本实施例中，对于任意相邻的平坦化层32和第一阻水层31，如果平坦化层32处于第一阻水层31的上方(即，平坦化层32比第一阻水层31更远离显示器件2)，则平坦化层32的面积大于第一阻水层31的面积；如果平坦化层32处于第一阻水层31的下方(即，平坦化层32比第一阻水层31更靠近显示器件2)，则平坦化层32的面积小于第一阻水层31的面积。如此设置，能使相邻的平坦化层32和第一阻水层31相互紧密包覆，同时，由于第一阻水层31具有很好地阻止外界的水汽和氧气侵入显示面板内部的作用，平坦化层32既具有很好的柔韧性，又能使封装膜层的层与层之间更加平坦，因此上述的封装结构不仅能对OLED显示器件进行很好地封装，防止外界的水汽和氧气侵入，而且还能使第一阻水层31不容易断裂，提高显示面板的耐弯折性能。
需要说明的是，对于任意相邻的平坦化层32和第一阻水层31，处于相对上方的平坦化层32(即，远离显示器件2的平坦化层32)的面积也可以小于或等于处于相对下方的第一阻水层31(即，靠近显示器件2的第一阻水层31)的面积，只要确保平坦化层32能够使封装膜层的层与层之间更加平坦。在这种情况下，也可使得第一阻水层31不容易断裂。
本实施例中，平坦化层32的厚度优选地大于相邻的第一阻水层31的厚度。第一阻水层31采用无机材料，平坦化层32采用有机材料。有机材料形成的平坦化层32具有很好的柔韧性， 厚度较大的平坦化层32能使封装膜层的层与层之间更加平坦。无机材料形成的第一阻水层31由于厚度较薄，所以第一阻水层31不易断裂。另外，通过在每个厚度较小的第一阻水层31的上方或下方紧贴一个厚度较大的平坦化层32，可以使各个第一阻水层31更加不容易断裂，从而进一步提高了显示面板的耐弯折性能。
当然，平坦化层32的厚度也可以小于或等于相邻的第一阻水层31的厚度，这也能在一定程度上使得各个第一阻水层31不容易断裂，从而提高显示面板耐弯折性能。
本实施例还提供一种上述显示面板的制备方法，包括：在第一基板上形成显示器件；以及在形成有显示器件的第一基板上方形成封装结构。形成封装结构包括形成至少两个第一阻水层和至少一个平坦化层，其中第一阻水层和平坦化层依次交替形成于显示器件上方，并且每个第一阻水层均包括多个第一区域和多个第二区域，且任意两个第一阻水层的第一区域和第二区域的接缝线相互错开。
其中，形成第一阻水层具体包括步骤S1至S4。
步骤S1：在第一基板上方布置开设有第一区域图案的第一掩模板，使得所述第一区域图案与将要形成所述多个第一区域的区域对应。
该步骤中，第一掩模板中的第一区域图案为设置在第一掩模板中的与第一阻水层中的第一区域的图案相对应的开口，开口以外的其他区域为厚度均匀的掩模板。开口形式的第一区域图案有利于后续通过一步沉积形成第一区域。
步骤S2：沉积形成第一阻水层的多个第一区域。
在该步骤中，第一区域采用物理溅射沉积或化学气相沉积的方法形成。第一区域直接沉积形成于第一掩模板的开口(即，第一区域图案)中，无需其他的任何工艺，非常简便。
步骤S3：在经过前述步骤的第一基板上布置开设有第二区域图案的第二掩模板，使得所述第二区域图案与将要形成所述多 个第二区域的区域对应。
该步骤中，第二掩模板中的第二区域图案为开设在第二掩模板中的与第一阻水层中的第二区域的图案相对应的开口，开口以外的其他区域为厚度均匀的掩模板。开口形式的第二区域图案有利于后续通过一步沉积形成第二区域。
步骤S4：沉积形成第一阻水层的多个第二区域。
在该步骤中，第二区域采用物理溅射沉积或化学气相沉积的方法形成。第二区域直接沉积形成于第二掩模板的开口(即，第二区域图案)中，无需其他的任何工艺，非常简便。
至此，一个第一阻水层制备完毕。紧接着，在该第一阻水层上形成一个平坦化层，形成平坦化层具体包括：
步骤S5：在完成前述步骤的第一基板上布置开设有平坦化层图案的第三掩模板，使得所述平坦化层图案与将要形成所述平坦化层的区域对应。
该步骤中，第三掩模板中的平坦化层图案为开设在第三掩模板中的与平坦化层的图案相对应的开口，开口以外的其他区域为厚度均匀的掩模板。开口形式的平坦化层图案有利于后续通过一步沉积、打印或涂敷的方法形成平坦化层。
步骤S6：采用涂敷、打印或化学气相沉积的方法形成平坦化层。
其中，平坦化层直接沉积或涂敷形成于第三掩模板的开口(即，平坦化层图案)中，无需其他的任何工艺，非常简便。另外，平坦化层也可以通过丝网印刷的方法形成。
步骤S7：通过加热或LED蓝光照射的方法对平坦化层进行固化。
至此，一个平坦化层制备完毕。
上述步骤S1至步骤S4、步骤S5至S7可以重复交替进行，直至所有的第一阻水层和平坦化层都完成制备。至此，OLED显示器件的封装结构即制备完成，OLED显示器件的封装也随之完成，同时，整个OLED显示面板的制备完成。
可以理解的是，在重复执行步骤S1至S4以形成不同的第一阻水层时，所用的第一掩模板的第一区域图案各不相同，且所用的第二掩模板的第二区域图案均也各不相同，以使得任意两个第一阻水层的第一区域和第二区域的接缝线相互错开，并且远离显示器件的第一阻水层的面积大于靠近显示器件的第一阻水层的面积。
类似地，在重复执行步骤S5至S7以形成不同的平坦化层时，所用的第三掩模板的平坦化层图案也可以各不相同。
此外，在本实施例中，由于第一阻水层具有很好地阻止外界的水汽和氧气侵入显示面板内部的作用，所以优选地，第一阻水层比平坦化层多一层，这样能保证封装结构的最外层为第一阻水层。
上述显示面板的制备方法工艺简便，既能最终确保每个第一阻水层都不容易断裂，提高显示面板的耐弯折性能；又能提高显示面板的制备效率。
实施例2：
本实施例提供一种显示面板，如图4和图5所示，在每个第一阻水层31中，第一区域311和第二区域312在行和列的方向上均交替设置。与实施例1不同的是，具体地在行和列的方向上均包括多个第一区域311和多个第二区域312。
可以理解的是，在每个第一阻水层31中，在行或列的方向上包括的第一区域311和第二区域312的个数也可以不相等，只要多个第一区域311和多个第二区域312交替布置即可，比如，第一区域311的个数可以比第二区域312的个数多一个或少一个。而且，在行方向上包括的第一区域311或第二区域312的个数也可以与在列方向上包括的第一区域311或第二区域312的个数不同，在行(或列)方向上包括的第一区域311和第二区域312的个数可以根据显示面板的大小以及第一区域311和第二区域312的大小来确定，在此不进行具体限定。
另外，每个第一阻水层31中的多个第一区域311(或多个第二区域312)的大小可以相等也可以不相等，只要能够保证任意两个所述第一阻水层31中的所述第一区域和所述第二区域的接缝线313相互错开即可。
本实施例中显示面板的其他结构以及显示面板的制备方法均与实施例1中相同，此处不再赘述。
实施例3：
本实施例提供一种显示面板，与实施例1-2不同的是，本实施例中的封装结构还包括至少一个第二阻水层，该第二阻水层覆叠在显示器件上方，第二阻水层采用无机材料。
本实施例中，如图6所示，封装结构包括一个第二阻水层33，第二阻水层33覆叠在显示器件2上方的最外层(即，位于封装结构的最外层)。更具体地，第二阻水层33覆叠在距离显示器件2最远的第一阻水层31上。
由于第二阻水层33未被分隔成第一区域和第二区域(即第二阻水层33为一个整体膜层)，所以第二阻水层33的设置能够进一步防止外界环境中的水汽通过第一阻水层31中第一区域311和第二区域312之间的接缝线313侵入显示器件2内部，从而更好地对显示器件2进行保护。
需要说明的是，第二阻水层33可以覆叠在显示器件2上方的任意位置，如紧贴显示器件2设置，或者覆叠在远离显示器件2的最外层(如图6所示)，或者夹设于第一阻水层31与平坦化层32之间。第二阻水层33还可以为多个。
在此，对第二阻水层33的面积不做限制，第二阻水层33优选地覆盖与其相邻的第一阻水层31中的所有接缝线313。
本实施例中显示面板的其他结构与实施例1或实施例2中相同，此处不再赘述。
实施例1-3的有益效果：实施例1-3中所提供的显示面板， 通过将每个第一阻水层都分隔成第一区域和第二区域，并使任意两个第一阻水层的第一区域和第二区域的接缝线相互错开，能使显示面板在弯折时，第一阻水层在沿裂纹或小孔等缺陷位置受到的应力能够分散开来，从而阻断了第一阻水层的断裂路径，提高了显示面板的耐弯折性能。
实施例4：
本实施例提供一种显示装置，包括实施例1-3任意一个中的显示面板。
通过采用实施例1-3任意一个中的显示面板，使显示装置的耐弯折性能得到了提高。
上述显示装置可以为：电子纸、OLED面板、手机、平板电脑、电视机、显示器、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。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。

Claims (14)

  1. 一种显示面板，包括第一基板、设置在第一基板上的显示器件和用于对第一基板上的显示器件进行封装的封装结构，所述封装结构包括至少两个第一阻水层和至少一个平坦化层，所述第一阻水层和所述平坦化层依次交替覆叠在所述显示器件上方，其中，每个所述第一阻水层都包括多个第一区域和多个第二区域，任意两个所述第一阻水层的所述第一区域和所述第二区域的接缝线相互错开设置。
  2. 根据权利要求1所述的显示面板，其中，在每个所述第一阻水层中，所述多个第一区域和所述多个第二区域在行和列的方向上都交替分布。
  3. 根据权利要求1所述的显示面板，其中，对于任意相邻的两个所述第一阻水层，远离所述显示器件的所述第一阻水层的面积大于靠近所述显示器件的所述第一阻水层的面积。
  4. 根据权利要求1所述的显示面板，其中，对于任意相邻的所述平坦化层和所述第一阻水层，远离所述显示器件的所述平坦化层的面积大于靠近所述显示器件的所述第一阻水层的面积；靠近所述显示器件的所述平坦化层的面积小于远离所述显示器件的所述第一阻水层的面积。
  5. 根据权利要求1所述的显示面板，其中，所述平坦化层的厚度大于相邻的所述第一阻水层的厚度。
  6. 根据权利要求1-5任意一项所述的显示面板，其中，所述第一阻水层采用无机材料，所述平坦化层采用有机材料。
  7. 根据权利要求6所述的显示面板，其中，所述封装结构 还包括至少一个第二阻水层，所述第二阻水层覆叠在所述显示器件上方，所述第二阻水层采用无机材料。
  8. 根据权利要求7所述的显示面板，其中，每个所述第二阻水层为一个整体膜层，并且覆盖相邻的第一阻水层中的所有所述接缝线。
  9. 根据权利要求8所述的显示面板，其中，至少一个所述第二阻水层位于所述封装结构的最外层。
  10. 一种显示装置，其中，包括权利要求1-9任意一项所述的显示面板。
  11. 一种显示面板的制备方法，包括：
    在第一基板上形成显示器件；以及
    在所述显示器件上方形成封装结构，
    形成所述封装结构包括形成至少两个第一阻水层和至少一个平坦化层，其中所述至少两个第一阻水层和至少一个所述平坦化层依次交替形成于所述显示器件上方，其中，每个所述第一阻水层均包括多个第一区域和多个第二区域，且任意两个所述第一阻水层的所述第一区域和所述第二区域的接缝线相互错开。
  12. 根据权利要求11所述的制备方法，其中，形成所述第一阻水层具体包括步骤：
    S1：布置开设有第一区域图案的第一掩模板，所述第一区域图案与将要形成所述多个第一区域的区域对应；
    步骤S2：沉积形成所述第一阻水层的所述多个第一区域；
    步骤S3：布置开设有第二区域图案的第二掩模板,所述第二区域图案与将要形成所述多个第二区域的区域对应；
    步骤S4：沉积形成所述第一阻水层的所述多个第二区域。
  13. 根据权利要求12所述的制备方法，其中，所述第一区域和所述第二区域采用物理溅射沉积或化学气相沉积的方法形成。
  14. 根据权利要求12所述的制备方法，其中，形成所述平坦化层具体包括：
    步骤S5：布置开设有平坦化层图案的第三掩模板,所述第二区域图案与将要形成所述第二区域的区域对应；
    步骤S6：采用涂敷、打印或化学气相沉积的方法形成所述平坦化层；以及
    步骤S7：通过加热或LED蓝光照射的方法对所述平坦化层进行固化。
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