WO2015085705A1 - 一种有机电致发光显示器件及显示装置 - Google Patents

一种有机电致发光显示器件及显示装置 Download PDF

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WO2015085705A1
WO2015085705A1 PCT/CN2014/077028 CN2014077028W WO2015085705A1 WO 2015085705 A1 WO2015085705 A1 WO 2015085705A1 CN 2014077028 W CN2014077028 W CN 2014077028W WO 2015085705 A1 WO2015085705 A1 WO 2015085705A1
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film layer
display device
circular polarizer
organic electroluminescence
substrate
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French (fr)
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王继亮
李重君
徐晓光
曾庆慧
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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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
    • 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
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/868—Arrangements for polarized light emission
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • 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
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/841—Self-supporting sealing arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • 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

Definitions

  • organic electroluminescent display has the characteristics of fast response, wide color gamut, ultra-thin, and flexibility compared with conventional liquid crystal display devices (LCD). , has gradually become the mainstream of the display field.
  • the structure of the OLED display device mainly includes: a substrate substrate and an electroluminescent pixel array fabricated on the substrate. Wherein each of the organic electroluminescent pixel arrays comprises opposite anodes and cathodes, and a light-emitting layer between the anode and the cathode.
  • the luminescence of the OLED display device is achieved by exciting the organic material in the luminescent layer by the electrons in the cathode and the holes in the anode recombining in the luminescent layer.
  • organic materials used as light-emitting layers and active metals used as cathodes are extremely sensitive to moisture and oxygen. Therefore, OLED display devices require higher packaging technology than other display devices.
  • the OLED display device package is not strong, moisture and oxygen will infiltrate into the interior of the display, causing oxidation of the cathode metal and organic deterioration of the light-emitting layer, which may shorten the life of the OLED display device or directly cause fatal devices.
  • the damage caused by the impact makes) 3 ⁇ 4.
  • the package is mainly packaged by a glass cover.
  • the existing method mainly involves simply coating the OLED display device with a thin film, then performing a water-blocking oxygen film, and reducing the reflection of the ambient light by the OLED display device. Display contrast and visibility: After attaching the water blocking oxygen film, you need to attach the circular polarizer.
  • a color resist layer needs to be formed on the light-emitting side of the OLED display device to realize full-color display.
  • the color resist layer 4 is generally formed directly on the base substrate 1, and the organic electroluminescent pixel array 2 is formed on the color resist layer 4, and then the organic electroluminescence is performed.
  • Illuminated pixel array 2 for packaging The package film 3 is formed, and after the package is completed, the circular polarizer 5 is attached to the light exit side.
  • a color resist layer is generally formed on the package cover, and then the OLED substrate is paired to realize full color display, and the water blocking oxygen film and the circular polarizer are sequentially attached to the case.
  • the present invention provides an organic electroluminescence display device and a display device, which are required to solve the problem that the conventional organic electroluminescence display device requires a film, which leads to cumbersome process, high cost, and curl of the flexible organic electroluminescent display device. Difficult problem.
  • an embodiment of the present invention provides an organic electroluminescence display device including a substrate substrate, an organic electroluminescence pixel array disposed on the substrate substrate, and a package cover plate on the electroluminescent pixel array, wherein when the light exiting side of the organic electroluminescent display device is one side of the package cover, the package cover is an optical film laminate; When the light emitting side of the organic electroluminescent display device is one side of the base substrate, the base substrate is an optical film laminate;
  • the optical film laminate includes: a support substrate, a circular polarizer film layer on the support substrate, a water blocking oxygen film layer, and a color resist film layer, wherein
  • the support substrate is located on a side away from the organic electroluminescent pixel array
  • the light incident side surface of the circular polarizer film layer faces the support substrate;
  • the water blocking oxygen film layer is located on the light exiting side of the circular polarizer film layer, and/or between the light incident side of the circular polarizer film layer and the support substrate;
  • the color resist film layer is located on the light exiting side of the circular polarizer film layer or between the light incident side of the circular polarizer film layer and the support substrate.
  • the water-blocking oxygen film layer may also be provided as a planarization layer on the surface of the color resist film layer facing away from the support substrate.
  • the planarization layer can be omitted, and the overall thickness of the optical film laminate can be further reduced, which is more advantageous for thinning and thinning of the OLED display device.
  • the water blocking oxygen film layer may include one or a combination of the following: Inorganic material film, and
  • Inorganic material film layer machine material film layer inorganic material film layer laminate.
  • the circular polarizer film layer may include: a retardation film layer, a polarizing functional film layer, and a support film layer, which are sequentially stacked, wherein
  • the retardation film layer is a light exiting side of the circular polarizer film layer
  • the support film layer is a light incident side of the circular polarizer film layer.
  • the material of the polarizing functional film layer may be, for example, polyvinyl alcohol or carbon nanotubes.
  • the circular polarizer film layer may include: a retardation film layer and a polarizing functional film layer, wherein
  • the retardation film layer is a light exiting side of the circular polarizer film layer
  • the polarizing functional film layer is a light incident side of the circular polarizer film layer
  • the material of the polarizing functional film layer is a carbon nanotube.
  • Another embodiment of the present invention provides a display device comprising the above-described organic electroluminescence display device provided by the present invention.
  • the optical film laminate includes a circular polarizer film layer, a water blocking oxygen film layer, and a color resist film layer, It can combine anti-reflection function, good water-blocking oxygen performance and full-color display function, which can not only solve the cumbersome process and cost increase caused by film coating of OLED display device, but also avoid flexible OLED display device brought by film
  • the thickness becomes thicker, which causes difficulty in curling, and at the same time, the OLED display device has the advantages of being lighter and thinner, and having better display effect.
  • FIG. 1 is a schematic structural view of a conventional organic electroluminescence display device
  • FIGS. 2a and 2b are schematic structural views of an organic electroluminescent display device according to an embodiment of the present invention.
  • Fig. 3B and Fig. 3b are respectively schematic views showing the structure of an optical film laminate in the embodiment of the present invention.
  • each layer of the film in the drawings does not reflect the true proportion of the organic electroluminescent display device, and the purpose thereof is only to schematically illustrate the contents of the present invention.
  • FIG. 2a and 2b are schematic views showing the structure of an organic electroluminescence display device according to an embodiment of the present invention.
  • the organic electroluminescent display device provided in this embodiment includes: a substrate substrate 02, an organic electroluminescence pixel array 03 disposed on the substrate substrate 02, and an organic electro-electrode A package cover 04 over the illuminating pixel array 03.
  • the package cover 04 is an optical film laminate
  • the base substrate 02 is an optical film laminate.
  • the optical film laminate 01 includes: a support substrate 001, a circular polarizer film layer 002 on the support substrate 001, and a water-blocking oxygen film layer. 003 and a color resist film layer 004, wherein
  • the support substrate 001 is located on a side away from the organic electroluminescent pixel array 03;
  • the light-incident side of the circular polarizer film layer 002 is directed to the support substrate 001;
  • the water blocking oxygen film layer 003 is located on the light outgoing side of the circular polarizer film layer 002, and/or between the light incident side of the circular polarizer film layer 002 and the support substrate 001;
  • the color resist film layer 004 may be located on the light exiting side of the circular polarizer film layer 002 as shown in Fig. 3b, or may be located between the light incident side of the circular polarizer film layer 002 and the support substrate 001 as shown in Fig. 3a.
  • the optical film laminate can be used as the package cover 04 of the OLED display device.
  • the support substrate in the film laminate should be located on the side away from the organic electroluminescent pixel array.
  • the optical film laminate can be used as the base substrate 02 of the OLED display device. At this time, the support substrate in the optical film laminate should be located away from the organic electricity.
  • One side of the photoluminescent pixel array is shown in FIG. 2a.
  • the organic electroluminescent pixel array 03 may include an organic electroluminescent structure composed of a plurality of anodes, cathodes, and a light-emitting layer between the anode and the cathode.
  • the specific structure of such an organic electroluminescent pixel array 03 is prior art, and is not done here. Narration.
  • the optical film laminate since the optical film laminate includes the circular polarizer film layer, the water blocking oxygen film layer and the color resist film layer, it can have both an antireflection function, a good ffi water oxygen property, and a full color display function.
  • the problem of cumbersome process and high cost of the OLED display device due to filming can be solved, and the thickness of the flexible OLED display device brought by the film can be prevented from becoming thick, which causes difficulty in curling, and can also make the OLED display device have It is lighter and thinner, and has better display effects.
  • the water-blocking oxygen film layer 003 can be disposed, for example, on the light-emitting side of the circular polarizer film layer 002.
  • the water-blocking oxygen film layer 003 is relatively close to the organic electroluminescence pixel array in the OLED display device, thereby The organic electroluminescent pixel array can be better protected against water and oxygen.
  • a water blocking oxygen film layer 003 may be provided between the light incident side of the circular polarizer film layer 002 and the support substrate 001, and Make a limit.
  • a plurality of water-blocking oxygen film layers 003 may be provided in the optical film laminate 01 described above.
  • a water-blocking oxygen film layer 003 may be provided on the light-emitting side of the circular polarizer film layer 002, and between the light-incident side of the circular polarizer film layer 002 and the support substrate 001.
  • the organic electroluminescent pixel array in the OLED display device can be double-proofed and anti-oxidized.
  • this also increases the overall thickness of the OLED display device, and therefore, the number of layers of the desired water-blocking oxygen film layer can be set according to actual needs.
  • the structure of the water blocking oxygen film layer 003 located on both sides of the circular polarizing film layer 002 may be the same or different. This is not limited.
  • water blocking oxygen film layer 003 for example, one of the following or a combination thereof may be included:
  • the material of the inorganic material film layer may be, for example, one or more of aluminum oxide (Al 2 O 3 ), titanium dioxide (Ti0 2 ), silicon nitride (SiN x ), or silicon carbide (SiC). The combination.
  • Al 2 O 3 aluminum oxide
  • Ti0 2 titanium dioxide
  • SiN x silicon nitride
  • SiC silicon carbide
  • the material of each layer of the inorganic material film layer may be the same or different, and is not limited herein.
  • the water-blocking oxygen film layer 003 can also be used as a planarization layer of the color ffi film layer 004. That is, as shown in Figs. 3a and 3b, there is always a water-blocking oxygen film layer 003 on the surface of the color resist film layer 004 facing away from the support substrate 001. In this way, the flattening layer which must be fabricated on the color resistive film layer in the prior art can be omitted, the film layer structure can be simplified, the overall thickness of the OLED display device can be thinned, and the thinning and thinning can be realized.
  • the circular polarizer film layer 002 mainly functions to prevent the reflected light from passing therethrough.
  • the circular polarizer film layer 002 may include: a phase difference film layer 0021, a polarizing function film layer 0022, and a support film layer 0023 which are sequentially stacked, wherein
  • the retardation film layer 002i is the light exiting side of the circular polarizer film layer 002, and the support film layer 0023 is the light incident side of the circular polarizer film layer 002.
  • the main function of the support film layer 0023 is to support and protect the polarizing function film layer 0022.
  • the material thereof may be, for example, a cycloolefin polymer (COP), a polycarbonate (PC) or a cellulose triacetate (TAC), and the film thickness thereof may be, for example, 10 nm to 100 ⁇ m.
  • the main function of the polarizing functional film layer 0022 is to convert natural light passing through the polarizing functional film layer 0022 into linearly polarized light.
  • the material may be polyvinyl alcohol (PVA) or carbon nanotubes (CNT), which is not limited herein.
  • the retardation film layer 0021 may be, for example, a quarter-wave retardation film which is mainly used to convert the passed linearly polarized light into circularly polarized light or to pass the circularly polarized light into linearly polarized light.
  • the village material may be, for example, cellulose triacetate (TAC) or acryl, and the film thickness thereof may be, for example, lum ⁇ : i 00 um.
  • the working principle of the circular polarizer film layer 002 is: combining the polarizing function film layer 0022 and the phase difference film layer 0021, natural light is incident from the polarizing function film layer 0022, and becomes linearly polarized light after the polarizing function film layer 0022, and then the line After the polarized light passes through the retardation film layer 0021, it changes from linearly polarized light to left-handed circularly polarized light. Thereafter, when the left-handed circularly polarized light is reflected back, it becomes right-handed circularly polarized light, and passes through the retardation film layer 0021 again, from the right.
  • the circularly polarized light becomes linearly polarized light, and the linearly polarized light at this time is perpendicular to the previous linearly polarized light, and cannot pass through the linear polarizer, so that the reflected light cannot be deflected from the polarized light.
  • the light functional film layer 0022 transmits, thereby reducing the influence of ambient light and improving contrast.
  • the material of the polarizing functional film layer 0022 is selected from polyvinyl alcohol (PVA)
  • the PVA material may be modified to impart a hydrophobic function to the PVA material.
  • the polarizing function film layer 022 of the PVA material but also the polarizing function film layer 0022 can be more effectively exhibited, and at the same time, when the optical film laminate 01 is applied to the OLED display device, The organic electroluminescent pixel array can be protected.
  • the polarizing function film layer 0022 can be formed, for example, by laminating 10 to 30 layers of super-aligned carbon nanotube films.
  • carbon nanotubes of uniform size are connected end to end and arranged in the same direction in the same direction along the extending direction of the carbon nanotubes.
  • the polarizing functional film layer made of carbon nanotubes has a uniform absorption property for light of each wavelength, and carbon nano-sized, compared with the polarizing functional film layer made of polyvinyl alcohol.
  • the tube has high resistance to high temperature and high humidity, and has excellent flexibility and light transmittance. Therefore, the polarizing functional film made of carbon nanotubes is suitable not only for general OLED display devices and flexible OLED display devices, but also for high temperature and high humidity. Under severe conditions should be) 3 ⁇ 4. At the same time, the carbon nanotubes have self-supporting ability.
  • the carbon nanotube when used to fabricate the polarizing functional film layer in the circular polarizing film layer, the arrangement of the supporting film layer can be omitted in the structure, and the structure and preparation of the optical film laminated body can be omitted. The process is simpler.
  • the supporting film layer 0023 can be omitted in the structure of the circular polarizing film layer 002, that is, only the phase difference film layer 0021 and the polarizing function film layer 0022 are included.
  • the retardation film layer 0021 is the light exit side of the circular polarizer film layer 002
  • the polarizing function film layer 0022 is the light incident side of the circular polarizer film layer 002.
  • the above optical film laminate 01 can be produced by a roll-to-roll method.
  • another embodiment of the present invention also provides a display device comprising the above-described organic electroluminescence display device of the present invention. Since the principle of solving the problem of the display device is similar to that of the foregoing organic electroluminescent display device, the implementation of the display device can be referred to the implementation of the foregoing organic electroluminescent display device, and the repeated description is omitted.
  • the display device of the present invention is used as a lining of an OLED display device by using a 3 ⁇ 4 optical film laminate
  • the bottom substrate or the package cover, the optical film laminate includes a circular polarizer film layer, a water-blocking oxygen film layer and a color resist film layer on the support substrate, so that the anti-reflection function, the good water-blocking oxygen performance and the whole can be combined
  • the color display function can not only solve the cumbersome process and cost increase of the OLED display device due to the film, but also can avoid the problem that the thickness of the flexible OLED display device brought by the film becomes thick, which causes difficulty in curling, and can also make OLED display devices have the advantages of being lighter and thinner and having better display effects.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种有机电致发光显示器件及显示装置，该有机电致发光显示器件采用光学薄膜层叠体作为衬底基板（02）或封装盖板（04），该光学薄膜层叠体包括位于支撑基板（001）上的圆偏光片膜层（002）、阻水氧膜层（003）以及色阻膜层（004），因此可以兼具抗反射功能、良好的阻水氧性能和全色彩显示功能，不仅可以解决OLED显示器件因贴膜所带来的工艺繁琐和成本升高的问题，而且可以避免贴膜带来的柔性OLED显示器件厚度变厚，导致卷曲困难的问题，同时还可以使OLED显示器件具有更轻薄、显示效果更好等优点。

Description

目前，有机电致发光显示器件（Organic Electroluminescent Display, OLED) 与传统的液晶显示器件 （Liquid Crystal Disp y, LCD) 相比， 由于具有响应 快、 色域广、 超薄、 能实现柔性化等特点， 已经逐渐成为显示领域的主流。
OLED 显示器件的结构主要包括： 衬底基板以及制作在衬底基板上的有 机电致发光像素阵列。 其中， 每个有机电致发光像素阵列都包含相对设置的 阳极和阴极， 以及位于阳极和阴极之间的发光层。 OLED 显示器件的发光是 通过阴极中的电子和阳极中的空穴在发光层中复合时， 激发发光层中的有机 材料发光来实现的。 而在 OLED显示器件中， 用作发光层的有机.材料以及用 作阴极的活泼金属对水气和氧气都极其敏感， 因此， OLED 显示器件需要比 其他的显示器件更高的封装技术的支持。 如果 OLED显示器件封装不牢固， 水气和氧气会丛周围环境渗入到显示器的内部， 丛而造成阴极金属的氧化和 发光层有机.材料的变质， 使得 OLED显示器件寿命缩短， 或者直接导致器件 致命的损坏而影响使) ¾。
目前， 在中、 小尺寸的 OLED显示器件中， 主要采用玻璃盖板的封装方 式进行封装。 而对于柔性或者大尺寸的 OLED显示器件， 现有的方法主要是 对 OLED显示器件简单进行薄膜封装后， 再进行阻水氧膜的贴覆， 并且为了 抑制因环境光被 OLED显示器件反射而降低显示对比度和可视性:， 在贴覆阻 水氧膜后还需要再贴覆圆偏光片。
另外， 在全色彩 OLED显示器中， 在发光层发白光时需要在 OLED显示 器件的出光侧制作色阻层以实现全色彩显示。 例如， 对于底发光型 OLED显 示器件， 如图 1所示， 一般在衬底基板 1上直接制作色阻层 4， 在色阻层 4 上制作有机电致发光像素阵列 2, 然后对有机电致发光像素阵列 2进行封装 形成封装薄膜 3，封装完成后，在出光侧贴覆圆偏光片 5。对于顶发光型 OLED 显示器件， 一般会在封装盖板上制作色阻层， 然后与 OLED基板进行对盒来 实现全色彩显示， 对盒后再依次贴覆阻水氧膜和圆偏光片。
由上述可知， 对于柔性或者大尺寸的 OLED显示器件， 现有的封装方法 需要进行贴膜， 从而带来工艺繁琐、 成本升高等问题， 并旦贴膜还会带来使 柔性器件厚度变厚， 导致卷曲困难的问题。
有鉴于此， 本发明提供一种有机电致发光显示器件及显示装置， ^以解 决现有的有机电致发光显示器件需要贴膜， 导致工艺繁琐、 成本升高以及柔 性有机电致发光显示器件卷曲困难的问题。
为解决上述问题， 本发明的一个实施例提供了一种有机电致发光显示器 件， 其包括衬底基板、 设置在所述衬底基板上的有机电致发光像素阵列、 以 及设置在所述有机电致发光像素阵列之上的封装盖板， 其中， 当所述有机电 致发光显示器件的出光侧为所述封装盖板的一侧时， 所述封装盖板为光学薄 膜层叠体； 或当所述有机电致发光显示器件的出光侧为所述衬底基板的一侧 时， 所述衬底基板为光学薄膜层叠体；
所述光学薄膜层叠体包括： 支撑基板、 位于所述支撑基板上的圆偏光片 膜层、 阻水氧膜层以及色阻膜层， 其中，
所述支撑基板位于远离所述有机电致发光像素阵列的一侧；
所述圆偏光片膜层的入光侧面向所述支撑基板；
所述阻水氧膜层位于所述圆偏光片膜层的出光侧， 和 /或位于所述圆偏光 片膜层的入光侧与所述支撑基板之间；
所述色阻膜层位于所述圆偏光片膜层的出光侧， 或位于所述圆偏光片膜 层的入光侧与所述支撑基板之间。
在本发明的一个示例中， 所述阻水氧膜层还可以作为平坦化层， 设置于 所述色阻膜层背离所述支撑基板的表面上。 这样， 可以省去平坦化层， 进一 步减薄光学薄膜层叠体的整体厚度， 更有利于 OLED显示器件的轻薄化。
在本发明的一个示例中， 所述阻水氧膜层可以包括以下之一或其组合： 无机材料膜层， 以及
无机材料膜层省机材料膜层无机材料膜层层叠体。
在本发明的另一个示例中， 所述圆偏光片膜层可以包括： 依次层叠设置 的相位差膜层、 偏光功能膜层和支撑膜层， 其中，
所述相位差膜层为所述圆偏光片膜层的出光侧， 所述支撑膜层为所述圆 偏光片膜层的入光侧。
所述偏光功能膜层的材料例如可以为聚乙烯醇或者碳纳米管。
在本发明的另一个示例中， 所述圆偏光片膜层可以包括： 相位差膜层和 偏光功能膜层， 其中，
所述相位差膜层为所述圆偏光片膜层的出光侧， 所述偏光功能膜层为所 述圆偏光片膜层的入光侧； 所述偏光功能膜层的材料为碳纳米管。
本发明的另一个实施例提供了一种显示装置， 其包括本发明提供的上述 有机电致发光显示器件。
本发明的上述技术方案的有益效果如下：
上述技术方案中， 通过采用光学薄膜层叠体作为 OLED显示器件的衬底 基板或封装盖板， 由于所述光学薄膜层叠体包括圆偏光片膜层、 阻水氧膜层 和色阻膜层， 因此可以兼具抗反射功能、 良好的阻水氧性能和全色彩显示功 能，不仅可以解决 OLED显示器件因贴膜导致的工艺繁琐和成本升高的问题， 而— 可以避免贴膜带来的柔性 OLED显示器件厚度变厚， 导致卷曲困难的问 题， 同时还可以使 OLED显示器件具有更轻薄、 显示效果更好等优点。
图 1为现有的有机电致发光显示器件的结构示意图；
图 2a和图 2b分别为本发明实施例提供的有机电致发光显示器件的结构 示意图；
图 ¾和图 3b分别为本发明实施例中光学薄膜层叠体的结构示意图。
下面结合 i附图， 对本发明的有机电致发光显示器件及显示装置的具体实 施方式进行详细地说明。
其中，附图中的各层薄膜厚度不反映有机电致发光显示器件的真实比例， 其目的只是示意性地说明本发明内容。
1. 有机电致发光显示器件
图 2a和图 2b分别为本发明实施例提供的有机电致发光显示器件的结构 示意图。 本实施例提供的有机电致发光显示器件， 如图 2a和图 2b所示， 包 括： 衬底基板 02、 设置在衬底基板 02上的有机电致发光像素阵列 03、 以及 设置在有机电致发光像素阵列 03之上的封装盖板 04。 其中， 当有机电致发 光显示器件 03的出光侧为封装盖板 04的一侧时，如图 2a所示，封装盖板 04 为光学薄膜层叠体； 当有机电致发光显示器件 03的出光侧为衬底基板 02的 一侧时， 如图 2b所示， 衬底基板 02为光学薄膜层叠体。
本实施例的有机电致发光显示器件中， 如图 3a和图 3b所示， 光学薄膜 层叠体 01包括： 支撑基板 001、 位于支撑基板 001上的圆偏光片膜层 002、 阻水氧膜层 003以及色阻膜层 004， 其中，
支撑基板 001位于远离有机电致发光像素阵列 03的一侧；
圆偏光片膜层 002的入光侧面向支撑基板 001 ;
阻水氧膜层 003位于圆偏光片膜层 002的出光侧， 和 /或位于圆偏光片膜 层 002的入光侧与支撑基板 001之间；
色阻膜层 004可以如图 3b所示， 位于圆偏光片膜层 002的出光侧， 或者 也可以如图 3a所示， 位于圆偏光片膜层 002的入光侧与支撑基板 001之间。
本实施例的有机电致发光显示器件，在) ¾作顶发光型 OLED显示器件时， 如图 2a所示， 可以将光学薄膜层叠体用作 OLED显示器件的封装盖板 04， 此时， 光学薄膜层叠体中的支撑基板应位于远离有机电致发光像素阵列的一 侧。在用作底发光型 OLED显示器件时， 如图 2b所示， 可以将光学薄膜层叠 体用作 OLED显示器件的衬底基板 02 , 此时， 光学薄膜层叠体中的支撑基板 应位于远离有机电致发光像素阵列的一侧。
本实施例的有机电致发光显示器件中，有机电致发光像素阵列 03可以包 括多个 阳极、 阴极以及位于阳极和阴极之间的发光层所组成的有机电致发 光结构。这样的有机电致发光像素阵列 03的具体结构为现有技术， 在此不做 赘述。
根据本实施例， 由于该光学薄膜层叠体包括圆偏光片膜层、 阻水氧膜层 和色阻膜层， 因此可以兼具抗反射功能、 良好的 ffi水氧性能和全色彩显示功 能。 此外， 不仅可以解决 OLED显示器件因贴膜导致的工艺繁琐和成本升高 的问题， 而且可以避免贴膜带来的柔性 OLED显示器件厚度变厚， 导致卷曲 困难的问题， 同时还可以使 OLED显示器件具有更轻薄、 显示效果更好等优 点。
下面， 结合图 3a和图 3b对本发明实施例中的光学薄膜层叠体进行更详 细地说明。本实施例中，在上述光学薄膜层叠体 01中，如图 3a和图 3b所示， 阻水氧膜层 003例如可以设置在圆偏光片膜层 002的出光侧。 这样， 在将上 述光学薄膜层叠体 01作为封装盖板或衬底基板应用到 OLED显示器件中时， 阻水氧膜层 003距 OLED显示器件中有机电致发光像素阵列的距离相对较近， 从而可以更好的对有机电致发光像素阵列起到防水和防氧的保护作用。
此外， 在上述光学薄膜层叠体 01中， 如图 3a和图 3b所示， 在圆偏光片 膜层 002的入光侧与支撑基板 001之间也可以设置阻水氧膜层 003， 在此不 做限定。
为了更进一步地对有机电致发光像素 列起到防水和防氧的保护作用， 在上述光学薄膜层叠体 01中， 还可以设置多个阻水氧膜层 003。 例如， 如图 3a和图 3b所示， 可以在圆偏光片膜层 002的出光侧， 以及在圆偏光片膜层 002的入光侧与支撑基板 001之间都设置阻水氧膜层 003。这样，可以对 OLED 显示器件中的有机电致发光像素阵列起到双重的防水、 防氧作) ¾。 但是， 这 样也会使 OLED显示器件的整体厚度增加， 因此， 可以根据实际需要， 设置 所需的阻水氧膜层的层数。
此外， 当在圆偏光片膜层 002的两侧都设置有阻水氧膜层 003时， 位于 圆偏光片膜层 002两侧的阻水氧膜层 003的结构可以相同， 也可以不同， 在 此不做限定。
作为阻水氧膜层 003， 例如可以包括以下之一或其组合：
无机材料膜层； 以及
无机材料膜层 -有机材料膜层-无机 料膜层层叠体。 其中， 作为无机材料膜层的材料例如可以为三氧化二铝 （A1203)、 二氧 化钛 （Ti02)、 氮化硅 （SiNx) 或碳化硅 （SiC ) 中的一种或两种以上的组合。 当阻水氧膜层的结构中包含多层无机材料膜层时， 各层无机材料膜层的材料 可以相同， 也可以不同， 在此不做限定。
进一步地， 在上述光学薄膜层叠体 01中， 还可以利用阻水氧膜层 003作 为色 ffi膜层 004的平坦化层。 即， 如图 3a和图 3b所示， 始终存在一个阻水 氧膜层 003位于色阻膜层 004背离支撑基板 001的表面上。 这样， 可以省去 现有技术中在色阻膜层之上必须制作的平 化层， 可以简化膜层结构， 减薄 OLED显示器件的整体厚度， 利于实现轻薄化。
在上述光学薄膜层叠体 01中，圆偏光片膜层 002主要起到防 l 反射光通 过的作用。 如图 3a和图 3b所示， 圆偏光片膜层 002可以包括： 依次层叠设 置的相位差膜层 0021、 偏光功能膜层 0022和支撑膜层 0023， 其中，
相位差膜层 002i为该圆偏光片膜层 002的出光侧， 支撑膜层 0023为圆 偏光片膜层 002的入光侧。
具体地， 支撑膜层 0023的主要作) ¾是对偏光功能膜层 0022起支撑和保 护作) ¾。 作为支撑膜层 0023， 其材料例如可以为环烯烃聚合物（COP)、 聚碳 酸酯 （PC )或三醋酸纤维素（TAC)， 其膜厚例如可以为 10nm~100um。 偏光 功能膜层 0022的主要作用是将通过该偏光功能膜层 0022的自然光转变为线 偏振光。 作为偏光功能膜层 0022， 其材料可以为聚乙烯醇 （PVA ) 或碳纳米 管 （CNT)， 在此不做限定。 相位差膜层 0021例如可以为四分之一波长延迟 片， 其主要作) ¾是使通过的线偏振光变为圆偏振光， 或将通过的圆偏振光变 为线偏振光。作为相位差膜层 0021， 其村料例如可以为三醋酸纤维素 ( TAC ) 或亚克力， 其膜厚例如可以为 lum〜： i 00um。
圆偏光片膜层 002 的工作原理是： 将偏光功能膜层 0022和相位差膜层 0021结合， 自然光从偏光功能膜层 0022入射， 经偏光功能膜层 0022之后变 为线偏振光，然后该线偏振光经过相位差膜层 0021之后从线偏振光变为左旋 圆偏振光， 之后， 当该左旋圆偏振光被反射回来后变为右旋圆偏振光， 再次 经过相位差膜层 0021， 从右旋圆偏振光变为线偏振光， 此时的线偏振光与之 前的线偏振光呈垂直状态， 不能通过线偏光片， 这样反射光就不能够从该偏 光功能膜层 0022透过， 从而减小环境光的影响， 提高对比度。
进一步地， 当偏光功能膜层 0022的材料选用聚乙烯醇 ( PVA) 时， 还可 以对 PVA材料进行改性， 使 PVA材料具有疏水功能。 这样， 不仅可以降低 PVA材料的偏光功能膜层 0022发生水解的可能性， 使偏光功能膜层 0022更 好地发挥偏光的作用， 同时， 当该光学薄膜层叠体 01应用于 OLED显示器件 时， 还可以对有机电致发光像素阵列起到保护作用。
此外， 当偏光功能膜层 0022的 料选用碳纳米管（CNT) 时， 该偏光功 能膜层 0022例如可以由 10〜30层超顺排列的碳纳米管薄膜层叠而成。 其中， 在每层碳纳米管薄膜中， 在沿碳纳米管的延伸方向上， 将尺寸均一的碳纳米 管首尾相连且沿同一方向择优取向排列。
进一步地， 采用碳纳米管制作的偏光功能膜层与采^聚乙烯醇制作的偏 光功能膜层相比， 由于超顺排列的碳纳米管对各波长的光具有均一的吸收特 性， 且碳纳米管耐高温、 高湿的能力强， 柔韧性和光透过性优良， 因此， 采 碳纳米管制作的偏光功能膜层不仅适合一般的 OLED 显示器件和柔性 OLED 显示器件， 而且可在高温高湿等恶劣条件下应) ¾。 同时， 碳纳米管具 有自支撑能力， 因此采用碳纳米管制作圆偏光片膜层中的偏光功能膜层时， 在结构上可以省掉支撑膜层的设置， 使光学薄膜层叠体的结构和制备工艺更 简单。
具体地， 在采用碳纳米管作为偏光功能膜层 0022的材料时， 圆偏光片膜 层 002的结构中可以省去支撑膜层 0023， 即仅包括： 相位差膜层 0021和偏 光功能膜层 0022， 其中， 相位差膜层 0021 为圆偏光片膜层 002的出光侧， 偏光功能膜层 0022为圆偏光片膜层 002的入光侧。
此外， 上述光学薄膜层叠体 01都可以通过卷对卷方式来制备。
2, 显示装置
基于同一发明构思， 本发明的另一个实施例还提供了一种显示装置， 其 包括本发明的上述有机电致发光显示器件。 由于该显示装置解决问题的原理 与前述的有机电致发光显示器件相似， 因此该显示装置的实施可以参见前述 有机电致发光显示器件的实施， 重复之处不再赘述。
本发明的显示装置， 通过采 )¾光学薄膜层叠体作为 OLED显示器件的衬 底基板或封装盖板， 光学薄膜层叠体包括位于支撑基板上的圆偏光片膜层、 阻水氧膜层以及色阻膜层， 因此可以兼具抗反射功能、 良好的阻水氧性能和 全色彩显示功能， 不仅可以解决 OLED显示器件因贴膜所带来的工艺繁琐和 成本升高的问题， 而且可以避免贴膜带来的柔性 OLED显示器件厚度变厚， 导致卷曲困难的问题， 同时还可以使 OLED显示器件具有更轻薄、 显示效果 更好等优点。
显然， 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本 发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的普 通技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润 饰， 这些改进和润饰也应视本发明的保护范围。

Claims

1 . 一种有机电致发光显示器件， 包括衬底基板、 设置在所述衬底基板上 的有机电致发光像素 列、 以及设置在所述有机电致发光像素 列之上的封 装盖板， 其特征在于： 当所述有机电致发光显示器件的出光侧为所述封装盖 板的一侧时， 所述封装盖板为光学薄膜层叠体； 或当所述有机电致发光显示 器件的出光侧为所述衬底基板的一侧时， 所述衬底基板为光学薄膜层叠体； 所述光学薄膜层叠体包括： 支撑基板、 位于所述支撑基板上的圆偏光片 膜层、 阻水氧膜层以及色阻膜层， 其中，
所述支撑基板位于远离所述有机电致发光像素阵列的一侧；
所述圆偏光片膜层的入光侧面向所述支撑基板；
所述阻水氧膜层位于所述圆偏光片膜层的出光侧， 和 /或位于所述圆偏光 片膜层的入光侧与所述支撑基板之间；
所述色阻膜层位于所述圆偏光片膜层的出光侧， 或位于所述圆偏光片膜 层的入光侧与所述支撑基板之间。
2. 如权利要求 1所述的有机电致发光显示器件， 其特征在于， 以所述阻 水氧膜层作为平坦化层， 设置于所述色阻膜层背离所述支撑基板的表面上。
3. 如权利要求 1所述的有机电致发光显示器件， 其特征在于， 所述阻水 氧膜层包括以下之一或其组合：
无机材料膜层； 以及
无机材料膜层 -有机材料膜层-无机.材料膜层层叠体。
4. 如权利要求 3所述的有机电致发光显示器件， 其特征在于， 所述无机 材料膜层的材料为三氧化二铝、 二氧化钛、 氮化硅或碳化硅中的一种或两种 以上的组合。
5. 如权利要求 1所述的有机电致发光显示器件， 其特征在于， 所述圆偏 光片膜层包括： 依次层叠设置的相位差膜层、 偏光功能膜层和支撑膜层， 其 中，
所述相位差膜层为所述圆偏光片膜层的出光侧， 所述支撑膜层为所述圆 偏光片膜层的入光侧。
6. 如权利要求 5所述的有机电致发光显示器件， 其特征在于， 所述偏光 功能膜层的材料为聚乙烯醇或者碳纳米管。
7. 如权利要求 6所述的有机电致发光显示器件， 其特征在于， 所述偏光 功能膜层的材料为改性聚乙烯醇。
8. 如权利要求 6所述的有机电致发光显示器件， 其特征在于， 所述偏光 功能膜层由 10〜30层超顺排列的碳纳米管薄膜层叠而成。
9. 如权利要求 5所述的有机电致发光显示器件， 其特征在于， 所述支撑 膜层的 料为环烯烃聚合物、 聚碳酸酯或三醋酸纤维素。
10. 如权利要求 5 所述的有机电致发光显示器件， 其特征在于， 所述相 位差膜层的材料为三醋酸纤维素或亚克力。
1 1. 如权利要求 1 所述的有机电致发光显示器件， 其特征在于， 所述圆 偏光片膜层包括： 相位差膜层和偏光功能膜层， 其中，
所述相位差膜层为所述圆偏光片膜层的出光侧， 所述偏光功能膜层为所 述圆偏光片膜层的入光侧；
所述偏光功能膜层的材料为碳纳米管。
12. 一种显示装置， 其特征在于， 包括如权利要求 1- U任一项所述的有 机电致发光显示器件。
PCT/CN2014/077028 2013-12-10 2014-05-08 一种有机电致发光显示器件及显示装置 Ceased WO2015085705A1 (zh)

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