WO2015196591A1 - 柔性膜、有机发光二极管显示面板及显示装置 - Google Patents

柔性膜、有机发光二极管显示面板及显示装置 Download PDF

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WO2015196591A1
WO2015196591A1 PCT/CN2014/086811 CN2014086811W WO2015196591A1 WO 2015196591 A1 WO2015196591 A1 WO 2015196591A1 CN 2014086811 W CN2014086811 W CN 2014086811W WO 2015196591 A1 WO2015196591 A1 WO 2015196591A1
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display panel
filter layer
film
layer
flexible film
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PCT/CN2014/086811
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French (fr)
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黄维
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京东方科技集团股份有限公司
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes

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  • At least one embodiment of the present invention is directed to a flexible film, an organic light emitting diode display panel, and a display device.
  • High resolution and flexibility of display devices have become an inevitable result.
  • High-resolution flexible organic light-emitting diode (OLED) devices have broad market prospects and profit margins.
  • At least one embodiment of the present invention provides a flexible film, an organic light emitting diode display panel, and a display device for phase compensation of light passing through one or more layers including optical anisotropy to recombine light The optical effect is optimized.
  • At least one embodiment of the present invention provides a flexible film comprising: a polarizer, a filter layer, a phase retardation film, and a first barrier layer.
  • the phase retardation film is disposed inside the filter layer for phase compensation of light passing through the filter layer.
  • At least one embodiment of the present invention also provides an organic light emitting diode display panel comprising the above flexible film, the flexible film being disposed on a light exiting side of the organic light emitting diode display panel.
  • At least one embodiment of the present invention also provides a display device including the above-described organic light emitting diode display panel.
  • Figure 1 shows a schematic structural view of a flexible film in accordance with one embodiment of the present invention
  • FIG. 2 is a schematic structural view of a flexible film according to another embodiment of the present invention.
  • 3A to 3F are views showing the generation of a phase retardation film according to an embodiment of the present invention.
  • 4A and 4B are schematic views showing the generation of a barrier layer according to an embodiment of the present invention.
  • 5A and 5B are schematic diagrams showing the structure of an organic light emitting diode display panel according to an embodiment of the invention.
  • a barrier film (barrier film), a POL (polarizer), and a color film included in a white light W-OLED+ color film include optical anisotropic components, After the light is emitted from the thin film encapsulation layer, different phase delays are experienced in each sub-pixel region, resulting in deterioration of the optical effect after the final recombination of the light.
  • FIG. 1 shows a schematic structural view of a flexible film in accordance with one embodiment of the present invention.
  • a flexible film according to an embodiment of the present invention includes a polarizer 2, a filter layer 3, a phase retardation film 4, and a first barrier layer 1; the phase retardation film 4 is disposed on the inner side of the filter layer 3, Phase compensation is performed on the light passing through the filter layer 3.
  • the inner side of the filter layer 3 refers to the side of the filter layer 3 remote from the polarizer 2.
  • the flexible film provided by the embodiment of the invention can phase compensate the light passing through the filter layer, eliminate the phase delay generated by the light passing through the filter layer and/or the barrier layer and the polarizer, and improve the display effect of the display panel.
  • the relationship between the anisotropy of the refractive index of the phase retardation film 4 and the anisotropy of the refractive index of the filter layer 3 is:
  • N is a positive integer
  • ⁇ n CF is the anisotropy of the refractive index of the filter layer 3
  • d CF is the thickness of the filter layer 3
  • ⁇ n LCP is the anisotropy of the refractive index of the phase retardation film 4.
  • d LCP is the thickness of the phase retardation film 4
  • ⁇ is the wavelength of the light incident on the filter layer.
  • ⁇ n CF may include anisotropy of a refractive index corresponding to each color region in the filter layer 3, such as anisotropy including refractive indices corresponding to red, green, and blue regions in the filter layer 3, respectively.
  • ⁇ n R , ⁇ n G and ⁇ n B correspondingly, the phase retardation film 4 also corresponds to three partitions corresponding to the above three regions, that is, ⁇ n LCP may include three values ⁇ n LCP1 , ⁇ n LCP2 , ⁇ n LCP3 .
  • the three layers of the refractive index anisotropy are ⁇ n LCP1 , ⁇ n LCP2 , ⁇ n LCP3 , respectively, to generate a phase change to compensate the light and then pass through the filter layer 3 .
  • the anisotropy of the refractive index is the phase delay caused by the three partitions of ⁇ n R , ⁇ n G and ⁇ n B , so that the combined light effect is optimized.
  • the first barrier layer 1 and the polarizer 2 also have an anisotropic composition, and the anisotropy of the refractive index of the three partitions in the phase retardation film 4 can be specifically adjusted as needed. .
  • the pattern of phase retardation film 4 may be formed by photo orientation.
  • the phase retardation film 4 may include a photo alignment layer 10 and a liquid crystal polymer film 12.
  • the phase retardation film 4 can be produced by a photo-alignment method, for example, as shown in FIGS. 3A to 3F.
  • a filter layer 3 having three primary colors (red, green, and blue) is formed on the polarizer 2, and a photo-alignment layer 10 is deposited on the filter layer 3, and is used by a precise partition exposure method of a photomask.
  • Three different polarization states of UV light (ultraviolet light) are photo-orientated to three zones, and three orientation effects are obtained, that is, the photo-alignment layer is patterned.
  • a reactive unit film 11 is then deposited on the patterned photo-alignment layer 10 to obtain a set arrangement pattern in the liquid crystal phase temperature interval. Further, the reactive light unit film 11 is cured by UV light to form a liquid crystal polymer film 12 having three kinds of micro-regions, that is, the photo-alignment layer 10 and the liquid crystal polymer film 12 are combined to form the phase retardation film 4.
  • the photo alignment layer 10 is thin, and the phase retardation effect is mainly achieved by the liquid crystal polymer film 12.
  • the above structure enables the phase retardation amount of each microdomain to be optimized by the arrangement direction of the liquid crystal polymer film 12 and the anisotropic refractive index index of the film when the light enters the phase retardation film 4, and the first barrier of subsequent deposition can also be considered.
  • Optical difference between layer 1 and pre-set polarizer 2 The phase delay caused by the property effectively compensates for the phase delay caused by the filter layer 3 and/or the first barrier layer 1 and the polarizer 2, thereby optimizing the combined light effect and improving the final display of the display panel. effect.
  • phase retardation film 4 By adding the phase retardation film 4 to the package structure, the phase of the light can be directly adjusted before the light is emitted from the display panel without additional phase adjustment means, thereby simplifying the manufacturing process of the OLED display panel and facilitating batch production. produce.
  • the first barrier layer 1 is disposed on the inner side of the polarizer 2. As shown in FIG. 1, the first barrier layer 1 is disposed on the side of the polarizer 2 on which the filter layer 3 is disposed. In the case where the thickness of the first barrier layer 1 is less than the predetermined thickness, in order to make the organic light emitting diode display panel have a better packaging effect, the first barrier layer 1 may be disposed inside the polarizer 2.
  • the first barrier layer 1 is disposed on the outer side of the polarizer 2 , that is, the first barrier layer 1 is disposed on a side of the polarizer 2 away from the filter layer 3 .
  • the thickness of the first barrier layer 1 is greater than or equal to the preset thickness, the resolution of the OLED display panel can be improved, and at the same time, in order to avoid the risk of light leakage and color mixing caused by the thick barrier layer, it is considered to sacrifice some packaging effects.
  • the first barrier layer 1 is disposed outside the polarizer 2 such that the overall performance index of the OLED display panel is improved.
  • the deposition mode of the barrier layer is as shown in FIG. 4A and FIG. 4B.
  • the first barrier layer 1 may be deposited by chemical vapor deposition (CVD), atomic layer deposition (ALD) or physical vapor deposition (PVD).
  • CVD chemical vapor deposition
  • ALD atomic layer deposition
  • PVD physical vapor deposition
  • At least one embodiment of the present invention provides an organic light emitting diode display panel having a structure as shown in FIGS. 5A and 5B, the organic light emitting diode display panel including the above flexible film, and the flexible film disposed on the organic light emitting diode The light exit side of the display panel.
  • the OLED display panel further includes: an encapsulation film 5, an organic material layer 6, and a transparent cathode (not shown, which may be a metal oxide film disposed on the organic material layer 6)
  • the organic material layer 6 may include, for example, some of a plurality of layers such as a hole injection layer, a hole transport layer, a composite light-emitting layer, an electron transport layer, and an electron injection layer.
  • the organic material layer 6 emits light in a top emission manner.
  • the light emitted by the organic material layer 6 is white light. This ensures that the OLED display panel emits white light in a top emission manner.
  • At least one embodiment of the present invention also provides a display device including the above-described organic light emitting diode display panel.
  • the display device of the embodiment of the present invention may be, for example, an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, or the like, or any product or component having a display function.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种柔性膜、有机发光二极管显示面板及显示装置，柔性膜包括：偏光片（2）、滤光层（3）、相位延迟膜（4）和第一阻隔层（1），相位延迟膜设置于滤光层外侧，用于对通过滤光层的光线进行相位补偿。柔性膜能够对射出滤光层的光线进行相位补偿，消除光线通过阻隔层、偏振片和滤光层后所产生的相位延迟，提高显示面板的显示效果。

Description

柔性膜、有机发光二极管显示面板及显示装置 技术领域
本发明的至少一个实施例涉及一种柔性膜、有机发光二极管显示面板和显示装置。
背景技术
显示器件的高分辨率化、柔性化已成为一种必然结果，高分辨率的柔性有机发光二极管(即OLED)器件具有广泛的市场前景和利润空间。
由于精细金属掩膜版热蒸镀法(FMM)对OLED器件分辨率的工艺限制，业内纷纷转向白光W-OLED+彩膜的方式来获得高分辨率OLED器件。
发明内容
本发明的至少一个实施例提供了一种柔性膜、有机发光二极管显示面板和显示装置，用以对经过一个或多个包括光学各向异性的膜层的光线进行相位补偿，使光线复合后的光学效果得到优化。
本发明的至少一个实施例提出了一种柔性膜，其包括：偏光片、滤光层、相位延迟膜和第一阻隔层。所述相位延迟膜设置于所述滤光层内侧，用于对通过所述滤光层的光线进行相位补偿。
本发明的至少一个实施例还提出了一种有机发光二极管显示面板，其包括上述柔性膜，所述柔性膜设置于所述有机发光二极管显示面板的出光侧。
本发明的至少一个实施例还提出了一种显示装置，其包括上述有机发光二极管显示面板。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1示出了根据本发明一个实施例的柔性膜的结构示意图；
图2示出了根据本发明另一个实施例的柔性膜的结构示意图；
图3A至图3F示出了根据本发明一个实施例的相位延迟膜生成示意图；
图4A和图4B示出了根据本发明实施例的阻隔层生成示意图；
图5A和图5B示出了根据本发明实施例的有机发光二极管显示面板的结构示意图。
附图标号说明：
1-第一阻隔层；2-偏光片；3-滤光层；4-相位延迟膜；5-封装膜；6-有机材料层；7-薄膜晶体管背板；8-第二阻隔层；9-基板；10-光取向层；11-反应性单元薄膜；12-液晶高分子薄膜。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通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，都属于本发明保护的范围。
本申请的发明人注意到，白光W-OLED+彩膜中所包括的barrier film(阻隔层)、POL(偏光片)和彩膜中的一种或几种包括光学各向异性的组分，可导致光线从薄膜封装层射出后在各个亚像素区域经历不同程度的相位延迟，造成光线最终复合后的光学效果劣化。
图1示出了根据本发明一个实施例的柔性膜的结构示意图。
如图1所示，根据本发明一个实施例的柔性膜包括偏光片2、滤光层3、相位延迟膜4和第一阻隔层1；相位延迟膜4设置于滤光层3的内侧，用于对通过滤光层3的光线进行相位补偿。滤光层3的内侧是指滤光层3的远离偏光片2的一侧。本发明实施例提供的柔性膜能够对通过滤光层的光线进行相位补偿，消除光线通过滤光层和/或阻隔层、偏光片后所产生的相位延迟，提高显示面板的显示效果。
在一个实施例中，相位延迟膜4折射率的各向异性与滤光层3折射率的各向异性之间的关系为：
△nCF×dCF+△nLCP×dLCP＝N×λ，
在上述公式中，N为正整数，△nCF为滤光层3折射率的各向异性，dCF为滤光层3的厚度，△nLCP为相位延迟膜4折射率的各向异性，dLCP为相位延迟膜4的厚度，λ为射入滤光层的光线的波长。
例如，△nCF可以包括滤光层3中每个颜色区域所对应的折射率的各向异性，比如包括分别对应滤光层3中红色、绿色、蓝色区域的折射率的各向异性的△nR、△nG和△nB；相应地，相位延迟膜4上也对应着与上述三个区域对应的三个分区，即△nLCP可以包括三个数值△nLCP1、△nLCP2、△nLCP3。这样，光线射入相位延迟膜4后，分别经过折射率的各向异性为△nLCP1、△nLCP2、△nLCP3的三个分区，产生相位变化，以补偿光线再经过滤光层3的折射率的各向异性为△nR，△nG和△nB的三个分区时所造成的相位延迟，使得复合的光线效果得到优化。
另外，在其他实施例中，还可以考虑第一阻隔层1和偏光片2也具有各向异性的组分，则可以具体根据需要调整相位延迟膜4中三个分区的折射率的各向异性。
在一个实施例中，相位延迟膜4的图形可以由光取向形成。
在一个实施例中，相位延迟膜4可以包括光取向层10和液晶高分子薄膜12。
相位延迟膜4可以通过光取向法生成，例如，如图3A至图3F所示。
首先在偏光片2上生成具有三原色(红、绿、蓝)的滤光层3，在滤光层3上沉积一层光取向层10，通过光掩膜(photomask)的精准分区曝光方式，使用三种不同偏振状态的UV光(紫外线)对三个分区进行光取向，获得三种取向效果，即对光取向层进行了图形化处理。
然后在图形化的光取向层10上沉积反应性单元薄膜11，在液晶相温度区间获得设定的排列模式。再使用UV光固化反应性单元薄膜11，形成具备三种微区排列的液晶高分子薄膜12，即光取向层10和液晶高分子薄膜12共同形成了相位延迟膜4。光取向层10较薄，相位延迟效果主要由液晶高分子薄膜12完成。
上述结构使得在光线进入相位延迟膜4时，可以通过液晶高分子薄膜12的排列方向和薄膜的各向异性折射率指数优化各个微区的相位延迟量，而且还可以考虑后续沉积的第一阻隔层1以及预先设置的偏光片2的光学各向异 性所造成的相位延迟，有效地弥补射出光线由于滤光层3和/或第一阻隔层1、偏光片2所带来的相位延迟，从而优化复合后的光线效果，提高显示面板的最终显示效果。
并且，通过在封装结构中添加相位延迟膜4，可以直接在光线射出显示面板之前对其相位进行调整，而无需额外添加相位调整装置，从而简化了有机发光二极管显示面板的制作工艺，更加便于批量生产。
在一个实施例中，第一阻隔层1设置于偏光片2的内侧。如图1所示，第一阻隔层1设置于偏光片2的设置有滤光层3的一侧。在第一阻隔层1的厚度小于预设厚度的情况下，为了使得有机发光二极管显示面板具有更好的封装效果，可以将第一阻隔层1设置于偏光片2的内侧。
如图2所示，在一个实施例中，第一阻隔层1设置于偏光片2的外侧，即第一阻隔层1设置于偏光片2的远离滤光层3的一侧。在第一阻隔层1的厚度大于或等于预设厚度的情况下，可以提高有机发光二极管显示面板的分辨率，同时为了避免较厚阻隔层所产生的漏光、混色风险，可以考虑牺牲一些封装效果，将第一阻隔层1设置于偏光片2的外侧，使得有机发光二极管显示面板的整体性能指数得到提高。
阻隔层的沉积方式如图4A和图4B所示，例如，可以采用化学气相沉积(CVD)方式，原子层沉积(ALD)方式或物理气相沉积(PVD)方式，将第一阻隔层1沉积于偏光片2的内侧或者外侧。
相应地，本发明的至少一个实施例提供了一种有机发光二极管显示面板，其结构如图5A和图5B所示，该有机发光二极管显示面板包括上述柔性膜，并且柔性膜设置于有机发光二极管显示面板的出光侧。
在一个实施例中，该有机发光二极管显示面板还包括：封装膜5、有机材料层6、透明阴极(图中未画出，可以为布设于有机材料层6上的一层金属氧化物薄膜)、薄膜晶体管背板7、第二阻隔层8和基板9。
在上述实施例中，有机材料层6例如可以包括空穴注入层、空穴传输层、复合发光层、电子传输层、电子注入层等多个层中的某几个层。
在一个实施例中，有机材料层6以顶发射方式射出光线。
在一个实施例中，有机材料层6射出的光线为白光。这样可以保证有机发光二极管显示面板以顶发射方式射出白光。
本发明的至少一个实施例还提出了一种显示装置，其包括上述有机发光二极管显示面板。
本发明实施例的显示装置例如可以为：电子纸、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。
需要注意的是，在本申请文件中，术语“第一”、“第二”仅用于区分目的，而不能理解为指示或暗示相对重要性。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包括在本发明的保护范围之内。
本申请要求于2014年6月26日递交的中国专利申请第201420347946.0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。

Claims (11)

  1. 一种柔性膜，包括：偏光片、滤光层、相位延迟膜和第一阻隔层，其中，所述相位延迟膜设置于所述滤光层内侧，用于对通过所述滤光层的光线进行相位补偿。
  2. 根据权利要求1所述的柔性膜，其中，所述相位延迟膜折射率的各向异性与所述滤光层折射率的各向异性之间的关系为：
    △nCF×dCF+△nLCP×dLCP＝N×λ，
    其中，N为正整数，△nCF为所述滤光层折射率的各向异性，dCF为所述滤光层的厚度，△nLCP为所述相位延迟膜折射率的各向异性，dLCP为所述相位延迟膜的厚度，λ为射入所述滤光层的光线的波长。
  3. 根据权利要求1或2所述的柔性膜，其中，所述相位延迟膜的图形由光取向形成。
  4. 根据权利要求1-3任一所述的柔性膜，其中，所述相位延迟膜包括光取向层和液晶高分子薄膜。
  5. 根据权利要求1至4中任一项所述的柔性膜，其中，所述第一阻隔层设置于所述偏光片内侧。
  6. 根据权利要求1至4中任一项所述的柔性膜，其中，所述第一阻隔层设置于所述偏光片外侧。
  7. 一种有机发光二极管显示面板，包括：如权利要求1至6中任一项所述的柔性膜，其中，所述柔性膜设置于所述有机发光二极管显示面板的出光侧。
  8. 根据权利要求7所述的有机发光二极管显示面板，还包括：封装膜、有机材料层、透明阴极、薄膜晶体管背板、第二阻隔层和基板。
  9. 根据权利要求8所述的有机发光二极管显示面板，其中，所述有机材料层以顶发射方式射出光线。
  10. 根据权利要求8或9所述的有机发光二极管显示面板，其中，所述有机材料层射出的光线为白光。
  11. 一种显示装置，包括：如权利要求7至10中任一项所述的有机发光二极管显示面板。
PCT/CN2014/086811 2014-06-26 2014-09-18 柔性膜、有机发光二极管显示面板及显示装置 WO2015196591A1 (zh)

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