WO2022205515A1 - Oled 显示面板与显示装置 - Google Patents

Oled 显示面板与显示装置 Download PDF

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WO2022205515A1
WO2022205515A1 PCT/CN2021/087567 CN2021087567W WO2022205515A1 WO 2022205515 A1 WO2022205515 A1 WO 2022205515A1 CN 2021087567 W CN2021087567 W CN 2021087567W WO 2022205515 A1 WO2022205515 A1 WO 2022205515A1
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layer
light
sub
blue
display panel
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PCT/CN2021/087567
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English (en)
French (fr)
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宋常健
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武汉华星光电半导体显示技术有限公司
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Priority to US17/312,158 priority Critical patent/US20240032368A1/en
Publication of WO2022205515A1 publication Critical patent/WO2022205515A1/zh

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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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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
    • H10K59/70—OLEDs integrated with inorganic light-emitting elements, e.g. with inorganic electroluminescent elements
    • 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
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/877—Arrangements for extracting light from the devices comprising scattering means
    • 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
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2101/00—Properties of the organic materials covered by group H10K85/00
    • H10K2101/90—Multiple hosts in the emissive layer
    • 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
    • H10K2102/331—Nanoparticles used in non-emissive layers, e.g. in packaging layer
    • 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
    • H10K2102/351—Thickness

Definitions

  • the present application relates to the field of display technology, and in particular, to an OLED display panel and a display device.
  • OLED Organic Light Emitting Diodes
  • OLED Organic Light-Emitting Diode
  • display is a current-type organic light-emitting device, which realizes light emission through the injection and recombination of carriers. , which can meet the new needs of consumers for display forms and other advantages, more and more panel manufacturers around the world have invested a lot of research and development on this, which has greatly promoted the industrialization process of OLED.
  • OLED displays include pixelated red OLED devices, blue OLED devices and green OLED devices, so as to realize color display.
  • red, green and blue organic light-emitting materials although green light-emitting materials have high luminous efficiency, However, it has the shortest lifespan among the current trichromatic light-emitting materials.
  • researchers have devoted a lot of energy to developing a new generation of long-life green light-emitting materials, the degree of lifespan improvement is still very limited, resulting in the preparation of long-life and high-efficiency OLED displays. It is a huge challenge, which seriously restricts the application of OLED displays in special display fields with stricter requirements on lifespan, such as vehicle displays and military displays.
  • the main purpose of the present invention is to provide an OLED display panel and a display device, which can improve the problem of low display life of the OLED display panel and the display device.
  • the present invention provides an OLED display panel, the OLED display panel includes a plurality of pixel units, the pixel units include red sub-pixels, green sub-pixels and blue sub-pixels, the OLED display panel includes:
  • a light-emitting device layer disposed on the array drive layer, includes a first light-emitting device configured to emit blue light in the blue sub-pixel region, a second light-emitting device configured to emit red light in the red sub-pixel region, and a third light-emitting device in the green sub-pixel region; and
  • the color conversion layer is disposed on the light-emitting device layer, is disposed on the light-emitting device layer and corresponds to the green sub-pixel region, and is used for converting the light emitted by the third light-emitting device into green light.
  • the third light-emitting device is an LED light-emitting device.
  • the third light-emitting device is a blue-light OLED device or a white-light OLED device.
  • the blue OLED device comprises an anode layer, a hole injection layer, a hole transport layer, a blue light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are stacked in sequence.
  • the blue light emitting layer includes at least two blue light emitting sub-layers arranged in layers, and adjacent blue light emitting sub-layers contain different light emitting host materials.
  • the blue light emitting layer includes at least two blue light emitting host materials.
  • the color conversion layer includes a green fluorescent material or a green quantum dot material.
  • the OLED display panel further includes a first black matrix layer, the first black matrix layer is disposed in a gap region between the red sub-pixels, green sub-pixels and blue sub-pixels, and is connected to the Color conversion layer same layer settings.
  • the gap between the first black matrix layer further includes a first blue color resist layer corresponding to the blue sub-pixel region, and a first red color resist layer corresponding to the red sub-pixel region.
  • a transparent leveling layer is further provided in the region corresponding to the blue sub-pixel and the red sub-pixel in the gap of the first black matrix layer, and the first black matrix layer, the transparent leveling layer and the A second color resist layer is also provided on the color conversion layer, and the second color resist layer includes a second green color resist layer corresponding to the green sub-pixel region and a second blue color resist layer corresponding to the blue sub-pixel region layer and a second red color resist layer corresponding to the red sub-pixel region.
  • the color conversion layer is doped with scattering particles.
  • the present invention further provides a display device, the display device includes an OLED display panel, the OLED display panel includes a plurality of pixel units, and the pixel units include red sub-pixels, green sub-pixels and blue sub-pixels pixel, the OLED display panel includes:
  • a light-emitting device layer disposed on the array drive layer, includes a first light-emitting device configured to emit blue light in the blue sub-pixel region, a second light-emitting device configured to emit red light in the red sub-pixel region, and a third light-emitting device in the green sub-pixel region; and
  • the color conversion layer is disposed on the light-emitting device layer and corresponds to the green sub-pixel region, and is used for converting the light emitted by the third light-emitting device into green light.
  • the third light-emitting device is a blue-light OLED device or a white-light OLED device.
  • the blue OLED device comprises an anode layer, a hole injection layer, a hole transport layer, a blue light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are stacked in sequence.
  • the blue light emitting layer includes at least two blue light emitting sub-layers arranged in layers, and adjacent blue light emitting sub-layers contain different light emitting host materials.
  • the blue light emitting layer includes at least two blue light emitting host materials.
  • the color conversion layer includes a green fluorescent material or a green quantum dot material.
  • the OLED display panel further includes a first black matrix layer, the first black matrix layer is disposed in a gap region between the red sub-pixels, green sub-pixels and blue sub-pixels, and is connected to the Color conversion layer same layer settings.
  • the gap between the first black matrix layer further includes a first blue color resist layer corresponding to the blue sub-pixel region, and a first red color resist layer corresponding to the red sub-pixel region.
  • a transparent leveling layer is further provided in the region corresponding to the blue sub-pixel and the red sub-pixel in the gap of the first black matrix layer, and the first black matrix layer, the transparent leveling layer and the A second color resist layer is also provided on the color conversion layer, and the second color resist layer includes a second green color resist layer corresponding to the green sub-pixel region and a second blue color resist layer corresponding to the blue sub-pixel region layer and a second red color resist layer corresponding to the red sub-pixel region.
  • the present invention provides an OLED display panel and a display device, the OLED display panel includes a plurality of pixel units, the pixel units include red sub-pixels, green sub-pixels and blue sub-pixels, the OLED display panel includes: a substrate an array driving layer, arranged on the substrate; a light-emitting layer, arranged on the array driving layer, comprising a first light-emitting device arranged in the blue sub-pixel region to emit blue light, arranged in the red sub-pixel region a second light-emitting device emitting red light, and a third light-emitting device disposed in the green sub-pixel region; and a color conversion layer disposed on the light-emitting layer, including a green conversion layer disposed in the green sub-pixel region , which is used to convert the light emitted by the third light-emitting device into green light.
  • the green OLED devices that should be arranged in the green sub-pixel area are replaced by other OLED devices of other light colors with higher light-emitting life, and then the other colors of light are converted into Green light, which can effectively solve the problem that the overall display life of the OLED display panel is low due to the low luminous life of the green OLED device, and the OLED display panel has a simple structure and can be completed by conventional manufacturing processes, which is convenient for large-scale realization. industrial production.
  • FIG. 1 is a schematic cross-sectional structure diagram of an OLED display panel provided by an embodiment of the present invention
  • FIG. 2 is a schematic cross-sectional structure diagram of another OLED display panel provided by an embodiment of the present invention.
  • FIG. 3 is a schematic cross-sectional structure diagram of another OLED display panel provided by an embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional structure diagram of another OLED display panel provided by an embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional structure diagram of another OLED display panel provided by an embodiment of the present invention.
  • FIG. 6 is a schematic cross-sectional structure diagram of another OLED display panel provided by an embodiment of the present invention.
  • An embodiment of the present invention provides an OLED display panel, which will be described in detail below with reference to the schematic cross-sectional structure diagram of the OLED display panel shown in FIG. 1 .
  • the OLED display panel includes a plurality of pixel units arranged in an array and spaced apart from each other, each of the pixel units includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the OLED display panel includes:
  • the substrate 110 can be a rigid substrate, such as a glass substrate, or a flexible substrate, such as a base substrate formed of a polyimide film;
  • the array driving layer 120 is disposed on the substrate 110.
  • the array driving layer 120 is formed by stacking multiple functional layers, and usually includes an active layer, a gate electrode layer, a source-drain electrode layer, an insulating layer and other necessary film layers , through a patterning process to form a predetermined pattern to form a plurality of thin film transistors arranged in an array and metal traces for signal transmission, the thin film transistors correspond to the pixel unit and are arranged in the pixel unit.
  • the spaced area that is, the non-open area;
  • the light-emitting layer 130 disposed on the array driving layer 120, includes a first light-emitting device 131 configured to emit blue light in the blue sub-pixel region, usually an OLED device emitting blue light, configured to emit light in the red sub-pixel region
  • the second light-emitting device 132 for red light is usually an OLED device emitting red light
  • the third light-emitting device 133 is disposed in the green sub-pixel region.
  • the first light-emitting device 131 , the second light-emitting device 132 and the third light-emitting device 133 The light emitting devices 133 are respectively electrically connected to the corresponding driving thin film transistors in the lower array driving layer 120 one by one;
  • a buffer layer 140 disposed on the light-emitting layer 130, the buffer layer 140 is usually composed of a silicon oxide film, a silicon nitride film or a laminated film of silicon nitride and silicon oxide;
  • the color conversion layer 141 is disposed on the green sub-pixel region on the buffer layer 140 , that is, correspondingly disposed above the third light-emitting device 133 , for converting the light emitted by the third light-emitting device 133 is green light, so that the green sub-pixel finally has the ability to emit green light.
  • the green light-emitting material has the fastest brightness decay and the shortest light-emitting life, resulting in the problem that the life of the green OLED device is shorter than that of other two-color OLED light-emitting devices.
  • the green OLED device disposed in the green sub-pixel area is replaced by other OLED devices of other light colors with a higher luminous life, and then the light of other colors is converted into green light by arranging a color conversion layer, which can effectively solve the problem of green light.
  • the luminous lifetime of the optical OLED device is too low, which leads to the problem that the overall display lifetime of the OLED display panel is low, and the OLED display panel has a simple structure and can be completed by a conventional preparation process, which is convenient for large-scale industrial production.
  • the third light emitting device 133 is a blue light OLED device or a white light OLED device.
  • the third light emitting device 133 when the third light emitting device 133 is a blue OLED device, the third light emitting device 133 and the first light emitting device 131 can be blue OLED devices with the same structure, that is, the structure shown in FIG. 2 is formed, In this way, the third light-emitting device 133 and the first light-emitting device 131 can be fabricated using the same fabrication process, which simplifies the fabrication process.
  • the third light-emitting device 133 is also an OLED device of other light colors, but the emitted light must contain light with energy greater than green light, otherwise it will not be used as a light source basis for converting into green light, for example, due to red light
  • the energy of the OLED is less than that of the green light.
  • the red OLED device currently has the longest light-emitting life among the red, green and blue OLED devices, it cannot be used as an excitation light source for conversion to green light.
  • the third light-emitting device disposed in the green sub-pixel region may not be an OLED light-emitting device, and may also be an LED light-emitting device or the like based on the requirement of improving the lifespan.
  • the blue OLED device disposed on the green sub-pixel includes an anode layer, a hole injection layer, a hole transport layer, a blue light emitting layer, an electron transport layer, an electron injection layer, and a cathode that are stacked in sequence.
  • the material of each functional layer of the blue OLED device can be selected from commonly used materials in the field, which is not particularly limited in the present invention.
  • the blue OLED device can also be based on actual Process requirements, including other functional layers, such as hole blocking layers, electron blocking layers, or light coupling-out layers, etc.
  • the structure or material of each functional layer can be optimized, specifically, the blue light emitting layer can be optimized, for example, the blue light emitting layer is designed to include at least two layers The blue light-emitting sub-layers are stacked and arranged, and the adjacent blue light-emitting sub-layers contain different light-emitting host materials; or the blue light-emitting layer is designed to include at least two blue light-emitting host materials. The materials are matched with each other to increase the luminous efficiency and lifetime of the blue OLED device.
  • the blue sub-pixels also use the above-mentioned optimized blue OLED devices, so that the lifespan of the OLED devices of the blue sub-pixels and the green sub-pixels is further improved, that is, the blue sub-pixels and the green sub-pixels are shortened.
  • the lifespan of the OLED device of the pixel and the OLED device of the red sub-pixel is poor, so that the display lifespan of the OLED display panel is further improved.
  • the color conversion layer includes a green fluorescent material or a green quantum dot material or other materials that can realize light emission color conversion through the principle of photoluminescence.
  • the quantum dot is an important low-dimensional semiconductor material, and the size of its three dimensions is not greater than twice the exciton Bohr radius of the corresponding semiconductor material.
  • the quantum dot is generally spherical or quasi-spherical.
  • common quantum dots are composed of IV, II-VI, IV-VI or III-V group elements, such as silicon quantum dots, germanium quantum dots, cadmium sulfide quantum dots, cadmium selenide quantum dots , cadmium telluride quantum dots, zinc selenide quantum dots, lead sulfide quantum dots, lead selenide quantum dots, indium phosphide quantum dots or indium arsenide quantum dots, etc., prepared by using quantum dots of certain materials and sizes.
  • the conversion layer can effectively convert the light emitted by the third light-emitting device into green light.
  • the OLED display panel further includes a first black matrix layer 142 , and the first black matrix layer 142 is configured on the red sub-pixels, the green sub-pixels and the The gap area between the blue sub-pixels is disposed in the same layer as the color conversion layer 141 .
  • a transparent leveling layer 143 is further provided in the region corresponding to the blue sub-pixels and the red sub-pixels in the gap of the first black matrix layer 142, and the transparent leveling layer 143 is connected to the first black matrix.
  • the heights of the layers 142 are substantially the same to form a flat upper surface and play a role of flattening, wherein the transparent leveling layer 143 is usually composed of a transparent organic material, which basically does not absorb red light and blue light, and does not Causes a loss of pixel brightness.
  • a thin film encapsulation layer 150 is disposed above the first black matrix layer 142, the color conversion layer 141 and the transparent leveling layer 143.
  • the thin film encapsulation layer 150 is usually composed of a first inorganic film layer, an organic film layer and a second inorganic film layer.
  • the film layers are formed by stacking each other to prevent the intrusion of water and oxygen in the environment from causing the failure of the OLED light-emitting device and causing poor display.
  • the transparent leveling layer in the above-mentioned embodiments can also be replaced with a color resist layer.
  • a color resist layer please refer to the schematic cross-sectional structure diagram provided in FIG. 4 .
  • the layer 144, the first red color resist layer 145, the color conversion layer 141 and the first black matrix layer 142 can absorb and filter most of the light entering the display panel from the environment, which greatly reduces the reflection effect of the display panel on the ambient light. This replaces the polarizer that needs to be attached to the display panel, simplifies the manufacturing process of the display panel, and reduces the thickness of the display panel to achieve better bending performance.
  • the conversion rate of the color conversion layer 141 to the light emitting lines of the third light emitting device 133 generally depends on the thickness of the color conversion layer 141 and the color conversion material contained in the color conversion layer 141 .
  • the thickness of the color conversion layer 141 can be appropriately increased, so that the time for the light emitting line of the third light emitting device 133 to pass through the color conversion layer 141 When the value is increased, the light-color conversion rate of the color conversion layer 141 is increased.
  • the color conversion layer 141 can be formed by mixing a variety of different color conversion materials, and the light-color conversion rate of the color conversion layer 141 is increased through the cooperation of the different color conversion materials.
  • scattering particles can be doped in the color conversion layer 141 , so that the light emitted by the third light emitting device 133 enters the color conversion layer 141 to be scattered, and the light path in the color conversion layer 141 is improved. to increase the light-color conversion rate of the color conversion layer 141. Specifically, by adjusting the doping ratio and particle size of the scattering particles, the light-color conversion of the color conversion layer 141 is maximized. Rate.
  • a color resist layer for filtering light is also provided. Specifically, referring to the schematic cross-sectional structure diagram provided in FIG.
  • the second green color resist layer 161 is correspondingly disposed above the color conversion layer 141 .
  • the light emitted by the color conversion layer 141 passes through the second green color resist layer 161 , the light emitted from the color conversion layer 141 passes through the second green color resist layer 161 .
  • the light is absorbed and filtered, thereby effectively improving the color purity of the green sub-pixels.
  • a second black matrix layer is further provided on the thin film encapsulation layer 150 corresponding to the gap region between the red sub-pixels, the green sub-pixels and the blue sub-pixels. 162, and a second blue color resist layer 163 is also provided in the corresponding area of the blue sub-pixel, and a second red color resist layer 164 is also provided in the corresponding area of the red sub-pixel, wherein, although the The blue sub-pixel and the red sub-pixel respectively emit light directly from the OLED period of the corresponding light color. In theory, there will be no other colors of light, but in the actual display process, there will inevitably be some large-angle scattering. The light enters the adjacent different-color sub-pixels, and the second blue color resist layer 163 and the second red color resist layer 164 can absorb and filter this part of the light, thereby improving the OLED display panel. Display quality.
  • the display panels of the embodiments of the present invention may also include any other necessary structures as required. Specifically, here Not limited.
  • Another embodiment of the present invention also provides a display device, the display device includes the OLED display panel provided in the above embodiment, and the display panel can be a smart phone, a tablet computer, a notebook computer, a digital camera, or a digital video camera , smart wearable devices, car monitors, televisions, e-book readers, etc.

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  • Inorganic Chemistry (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

本发明提供了一种OLED显示面板与显示装置，OLED显示面板包括依次设置的发光器件层和色转换层，发光器件层包括配置于绿色子像素区域的第三发光器件，色转换层包括配置于所述绿色子像素区域的绿色转换层，绿色转换层用于将第三发光器件发出的光转换为绿光，以改善现有OLED显示面板显示寿命低的问题。

Description

OLED显示面板与显示装置 技术领域
本申请涉及显示技术领域，具体涉及一种OLED显示面板与显示装置。
 背景技术
有机发光二极管（OLED，Organic Light-Emitting Diode）显示器是一种电流型的有机发光器件，是通过载流子的注入和复合而实现发光，因其具有轻薄、亮度高、功耗低、响应快、发光效率高、柔性好，能满足消费者对显示形态的新需求等优点，全球越来越多的面板厂家纷纷对此投入大量的研发，大大的推动了OLED的产业化进程。
 技术问题
目前，OLED显示器包括像素化的红光OLED器件，蓝光OLED器件以及绿光OLED器件，从而实现彩色显示，在现有的红绿蓝三色有机发光材料中，绿光发光材料虽然发光效率高，但是却在目前三基色发光材料中寿命最短，尽管科研人员已经投入大量精力来研发新一代长寿命绿光材料，但寿命提升的程度仍非常有限，从而导致制备长寿命高效率的OLED显示器仍然面临着巨大的挑战，更是严重制约了OLED显示器在对寿命要求更严格的特殊显示领域，如车载显示器，军用显示器的应用。
 技术解决方案
有鉴于现有技术的缺点，本发明的主要目的在于提供一种OLED显示面板与显示装置，可改善OLED显示面板与显示装置显示寿命低的问题。
第一方面，本发明提供了一种OLED显示面板，所述OLED显示面板包括多个像素单元，所述像素单元包括红色子像素、绿色子像素以及蓝色子像素，所述OLED显示面板包括：
基板；
阵列驱动层，设置于所述基板上；
发光器件层，设置于所述阵列驱动层上，包括配置于所述蓝色子像素区域发射蓝光的第一发光器件，配置于所述红色子像素区域发射红光的第二发光器件，以及配置于所述绿色子像素区域的第三发光器件；以及
色转换层，设置于所述发光器件层上，设置于所述发光器件层上且与所述绿色子像素区域对应，用以将所述第三发光器件发出的光转换为绿光。
根据本发明，所述第三发光器件为LED发光器件。
根据本发明，所述第三发光器件为蓝光OLED器件或白光OLED器件。
根据本发明，所述蓝光OLED器件包括依次层叠设置的阳极层、空穴注入层、空穴传输层、蓝光发光层、电子传输层、电子注入层以及阴极层。
根据本发明，所述蓝光发光层包括至少两层层叠设置的蓝光发光子层，且相邻所述蓝光发光子层包含的发光主体材料不同。
根据本发明，所述蓝光发光层包括至少两种蓝光发光主体材料。
根据本发明，所述色转换层包括绿色荧光材料或绿色量子点材料。
根据本发明，所述OLED显示面板还包括第一黑色矩阵层，所述第一黑色矩阵层配置于所述红色子像素、绿色子像素以及蓝色子像素之间的间隙区域，且与所述色转换层同层设置。
根据本发明，在所述第一黑色矩阵层的间隙还包括对应所述蓝色子像素区域的第一蓝色色阻层，以及对应所述红色子像素区域的第一红色色阻层。
根据本发明，在所述第一黑色矩阵层的间隙对应所述蓝色子像素以及红色子像素的区域还设置有透明流平层，且在所述第一黑色矩阵层、透明流平层以及色转换层上还设置有第二色阻层，所述第二色阻层包括对应所述绿色子像素区域的第二绿色色阻层、对应所述蓝色子像素区域的第二蓝色色阻层以及对应所述红色子像素区域的第二红色色阻层。
根据本发明，所述色转换层掺杂有散射粒子。
第二方面，本发明还提供了一种显示装置，所述显示装置包括OLED显示面板，所述OLED显示面板包括多个像素单元，所述像素单元包括红色子像素、绿色子像素以及蓝色子像素，所述OLED显示面板包括：
基板；
阵列驱动层，设置于所述基板上；
发光器件层，设置于所述阵列驱动层上，包括配置于所述蓝色子像素区域发射蓝光的第一发光器件，配置于所述红色子像素区域发射红光的第二发光器件，以及配置于所述绿色子像素区域的第三发光器件；以及
色转换层，设置于所述发光器件层上且与所述绿色子像素区域对应，用以将所述第三发光器件发出的光转换为绿光。
根据本发明，所述第三发光器件为蓝光OLED器件或白光OLED器件。
根据本发明，所述蓝光OLED器件包括依次层叠设置的阳极层、空穴注入层、空穴传输层、蓝光发光层、电子传输层、电子注入层以及阴极层。
根据本发明，所述蓝光发光层包括至少两层层叠设置的蓝光发光子层，且相邻所述蓝光发光子层包含的发光主体材料不同。
根据本发明，所述蓝光发光层包括至少两种蓝光发光主体材料。
根据本发明，所述色转换层包括绿色荧光材料或绿色量子点材料。
根据本发明，所述OLED显示面板还包括第一黑色矩阵层，所述第一黑色矩阵层配置于所述红色子像素、绿色子像素以及蓝色子像素之间的间隙区域，且与所述色转换层同层设置。
根据本发明，在所述第一黑色矩阵层的间隙还包括对应所述蓝色子像素区域的第一蓝色色阻层，以及对应所述红色子像素区域的第一红色色阻层。
根据本发明，在所述第一黑色矩阵层的间隙对应所述蓝色子像素以及红色子像素的区域还设置有透明流平层，且在所述第一黑色矩阵层、透明流平层以及色转换层上还设置有第二色阻层，所述第二色阻层包括对应所述绿色子像素区域的第二绿色色阻层、对应所述蓝色子像素区域的第二蓝色色阻层以及对应所述红色子像素区域的第二红色色阻层。
 有益效果
本发明提供了一种OLED显示面板与显示装置，所述OLED显示面板包括多个像素单元，所述像素单元包括红色子像素、绿色子像素以及蓝色子像素，所述OLED显示面板包括：基板；阵列驱动层，设置于所述基板上；发光层，设置于所述阵列驱动层上，包括配置于所述蓝色子像素区域发射蓝光的第一发光器件，配置于所述红色子像素区域发射红光的第二发光器件，以及配置于所述绿色子像素区域的第三发光器件；以及色转换层，设置于所述发光层上，包括配置于所述绿色子像素区域的绿色转换层，用以将所述第三发光器件发出的光转换为绿光。在该显示面板中，将本应设置于所述绿色子像素区域的绿光OLED器件取代为其他更高发光寿命的其他光色的OLED器件，再通过设置绿色转换层将其他颜色的光转换成绿光，从而可有效解决因绿光OLED器件发光寿命过低而导致OLED显示面板整体的显示寿命低的问题，且该OLED显示面板结构简单，利用常规的制备工艺即可完成，便于实现大规模的产业化生产。
 附图说明
图1是本发明实施例提供的一种OLED显示面板的截面结构示意图；
图2是本发明实施例提供的另一种OLED显示面板的截面结构示意图；
图3是本发明实施例提供的另一种OLED显示面板的截面结构示意图；
图4是本发明实施例提供的另一种OLED显示面板的截面结构示意图；
图5是本发明实施例提供的另一种OLED显示面板的截面结构示意图；
图6是本发明实施例提供的另一种OLED显示面板的截面结构示意图。
 本发明的实施方式
为让本发明上述目的、特征及优点更明显易懂，下文特举本发明较佳实施例，并配合附图，作详细说明如下。再者，本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
本发明实施例提供一种OLED显示面板，以下结合图1示出的该OLED显示面板的截面结构示意图进行详细说明。
具体地，所述OLED显示面板包括多个呈阵列排布且相互间隔的像素单元，每一所述的像素单元包括红色子像素、绿色子像素以及蓝色子像素，所述OLED显示面板包括：
基板110，根据实际的显示形态需求，所述基板110可以为刚性基板，如玻璃基板，或柔性基板，如由聚酰亚胺薄膜形成的衬底基板；
阵列驱动层120，设置于所述基板110上，所述阵列驱动层120由多层功能层堆叠形成，通常包括有源层、栅电极层、源漏电极层、绝缘层以及其他必要的膜层，通过图案化工艺形成预定的图案，以构成多个呈阵列排布的薄膜晶体管，以及用于信号传输的金属走线，所述薄膜晶体管与所述像素单元相对应，并排布于像素单元的间隔区域，即非开口区；
发光层130，设置于所述阵列驱动层120上，包括配置于所述蓝色子像素区域发射蓝光的第一发光器件131，通常为发射蓝光的OLED器件，配置于所述红色子像素区域发射红光的第二发光器件132，通常为发射红光的OLED器件，以及配置于所述绿色子像素区域的第三发光器件133，所述第一发光器件131、第二发光器件132以及第三发光器件133分别与下层阵列驱动层120中对应的驱动薄膜晶体管一一电性连接；
缓冲层140，设置于所述发光层130上，所述缓冲层140通常由氧化硅薄膜、氮化硅薄膜或氮化硅以及氧化硅的叠层薄膜构成；以及
色转换层141，设置于所述缓冲层140上的所述绿色子像素区域，即对应地设置于所述第三发光器件133的上方，用以将所述第三发光器件133发出的光转换为绿光，使得所述绿色子像素最终具备发射绿光的能力。
基于在现有已研发出的有机发光材料中，绿色发光材料亮度衰减最快，发光寿命最低，从而导致绿光OLED器件较其他两色OLED发光器件寿命更低的问题，本实施例将本应设置于所述绿色子像素区域的绿光OLED器件取代为其他更高发光寿命的其他光色的OLED器件，再通过设置色转换层将其他颜色的光转换成绿光，从而可有效解决因绿光OLED器件发光寿命过低而导致OLED显示面板整体的显示寿命低的问题，且该OLED显示面板结构简单，利用常规的制备工艺即可完成，便于实现大规模的产业化生产。
在本实施例的一些具体实施方式中，所述第三发光器件133为蓝光OLED器件或白光OLED器件。
其中，当所述第三发光器件133为蓝光OLED器件时，所述第三发光器件133与所述第一发光器件131可为相同结构的蓝光OLED器件，即形成如图2所示的结构，如此，所述第三发光器件133与所述第一发光器件131可使用同样的制备工艺进行制备，简化制备流程。
当然，所述第三发光器件133也为其他光色的OLED器件，但必须满足所发的光中包含能量大于绿光的光线，否则将没有作为转换成绿光的光源基础，例如由于红光的能量小于绿光的能量，虽然红光OLED器件目前为红绿蓝三色OLED器件中发光寿命最长的，但也无法作为转换为绿光的激发光源。
更进一步地，设置于所述绿色子像素区域的第三发光器件也可不为OLED发光器件，基于提升寿命的需求，也可为LED发光器件等。
在一些实施例中，设置于所述绿色子像素的所述蓝光OLED器件包括依次层叠设置的阳极层、空穴注入层、空穴传输层、蓝光发光层、电子传输层、电子注入层以及阴极；其中，所述蓝光OLED器件各功能层的材料选自本领域的常用材料即可，本发明对此不作特殊限定，另，除前述的功能层以外，所述蓝光OLED器件还可根据实际的工艺需求，包括其他功能层，例如空穴阻挡层、电子阻挡层或光耦合输出层等。
进一步地，为了提升该蓝光OLED器件的寿命，可对各个功能层的结构或材料进行优化，具体地，可针对所述蓝光发光层进行优化，例如将所述蓝光发光层设计为包括至少两层层叠设置的蓝光发光子层，且相邻所述蓝光发光子层包含的发光主体材料不同；或将所述蓝光发光层设计为包括至少两种蓝光发光主体材料，即通过将不同能级的发光材料进行相互匹配，以增加该蓝光OLED器件的发光效率与寿命。
可以理解的是，所述蓝色子像素同样使用上述经优化后的蓝光OLED器件，使得所述蓝色子像素与绿色子像素的OLED器件的寿命进一步提升，即缩短蓝色子像素与绿色子像素的OLED器件与红色子像素的OLED器件的寿命差，使得所述OLED显示面板的显示寿命得以进一步提升。
在一些实施例中，所述色转换层包括绿色荧光材料或绿色量子点材料或是其他可通过光致发光原理实现发光颜色转换的材料。
其中，所述量子点是一种重要的低维半导体材料，其三个维度的尺寸都不大于其对应的半导体材料的激子波尔半径的两倍，量子点一般为球形或类球形，直径通常为2-20纳米，常见的量子点由IV、II-VI、IV-VI或III-V族元素组成，例如可以为硅量子点，锗量子点、硫化镉量子点、硒化镉量子点、碲化镉量子点、硒化锌量子点、硫化铅量子点、硒化铅量子点、磷化铟量子点或砷化铟量子点等，通过采用的定材料和尺寸的量子点进行制备色转换层，即可有效地将所述第三发光器件所发的光转换为绿光。
在一些实施例中，请参阅图3提供的截面结构示意图，所述OLED显示面板还包括第一黑色矩阵层142，所述第一黑色矩阵层142配置于所述红色子像素、绿色子像素以及蓝色子像素之间的间隙区域，且与所述色转换层141同层设置。
进一步地，在所述第一黑色矩阵层142的间隙对应所述蓝色子像素以及红色子像素的区域还设置有透明流平层143，所述透明流平层143与所述第一黑色矩阵层142的高度基本相同，以形成平整的上表面，而起到平坦化的作用，其中，所述透明流平层143通常由透明的有机材料构成，对红光与蓝光基本无吸收，不会造成像素的亮度损失。
在所述第一黑色矩阵层142，色转换层141以及透明流平层143的上方设置有薄膜封装层150，所述薄膜封装层150通常由第一无机膜层，有机膜层以及第二无机膜层相互堆叠形成，用于防止环境中的水氧入侵造成OLED发光器件失效而引发显示不良。
在一些实施例中，还可将上述实施例中的透明流平层替换成色阻层，具体地，请参阅图4提供的截面结构示意图，在所述第一黑色矩阵层142的间隙还包括对应所述蓝色子像素区域第一发光器件131的第一蓝色色阻层144，以及对应所述红色子像素区域第二发光器件132的第一红色色阻层145，所述第一蓝色色阻层144、第一红色色阻层145、色转换层141以及所述第一黑色矩阵层142可吸收过滤大部分由环境射入显示面板内部的光线，大大降低显示面板对环境光的反射作用，以此代替需贴附于显示面板上的偏光片，简化显示面板的制备工艺，降低显示面板的厚度以实现更佳的弯折性能。
在上述实施例所提供的OLED显示面板中，所述色转换层141对所述第三发光器件133所发光线的转换率通常取决于所述色转换层141的厚度以及所包含的色转换材料。
因此，为了提升所述色转换层141的光色转换率，第一方面，可适当增加所述色转换层141的厚度，使得第三发光器件133所发光线通过所述色转换层141的时间增加，便使得所述色转换层141的光色转换率升高。
第二方面，所述色转换层141可由多种不同的色转换材料混合而成，通过不同的色转换材料相互配合，而使得所述色转换层141的光色转换率升高。
第三方面，可在所述色转换层141中掺杂的散射粒子，使得所述第三发光器件133所发光线进入所述色转换层141发生散射，在色转换层141中的光程得以延长，从而使得所述色转换层141的光色转换率升高，具体地，通过调整所述散射粒子的掺杂比例以及粒径大小，最大化地提升所述色转换层141的光色转换率。
然而，在实际应用中，无论通过何种工艺也很难将所述色转换层141的光色转换率提升至100%，因此，由所述第三发光器件133所发光线通过所述色转换层141后，除了绿光以外，不可避免地仍存在一部分为转化的其他颜色的光，从而影响所述绿色子像素的色纯度，进而导致所述OLED显示面板的显示品质不佳，为解决此问题，在一些实施例中，还设置了用于滤光的色阻层，具体地，参阅图5提供的截面结构示意图，在所述薄膜封装层150上对应所述绿色子像素的区域设置有第二绿色色阻层161，即对应地设置于所述色转换层141的上方，由所述色转换层141射出的光线通过所述第二绿色色阻层161后，除绿光以外的其他光线被吸收过滤掉，从而有效提升了所述绿色子像素的色纯度。
进一步地，请参阅图6示出的截面结构示意图，在所述薄膜封装层150上对应所述红色子像素、绿色子像素以及蓝色子像素之间的间隙区域还设置有第二黑色矩阵层162，以及在所述蓝色子像素的对应区域还设置有第二蓝色色阻层163，与在所述红色子像素的对应区域还设置有第二红色色阻层164，其中，尽管所述蓝色子像素与所述红色子像素各自分别直接由对应光色的OLED期间进行发光，理论上不会存在其他颜色的光线，但在实际显示的过程中，不可避免地会存在一些大角度散射光线射入到相邻的异色子像素内，而所述第二蓝色色阻层163与所述第二红色色阻层164即可吸收过滤这一部分的光线，从而提升所述OLED显示面板的显示品质。
需要说明的是，上述显示面板实施例中仅描述了上述结构，可以理解的是，除了上述结构之外，本发明实施例显示面板中，还可以根据需要包括任何其他的必要结构，具体此处不作限定。
本发明的另一实施例还提供了一种显示设备，所述显示设备包括上述实施例所提供的OLED显示面板，所述显示面板可以是智能手机、平板电脑、笔记本电脑、数码相机、数码摄像机、智能可穿戴设备、车载显示器、电视机、电子书阅读器等。
本发明已由上述相关实施例加以描述，然而上述实施例仅为实施本发明的范例。必需指出的是，已公开的实施例并未限制本发明的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围内。

Claims (20)

  1. 一种OLED显示面板，其中，所述OLED显示面板包括多个像素单元，所述像素单元包括红色子像素、绿色子像素以及蓝色子像素，所述OLED显示面板包括：
    基板；
    阵列驱动层，设置于所述基板上；
    发光器件层，设置于所述阵列驱动层上，包括配置于所述蓝色子像素区域发射蓝光的第一发光器件，配置于所述红色子像素区域发射红光的第二发光器件，以及配置于所述绿色子像素区域的第三发光器件；以及
    色转换层，设置于所述发光器件层上且与所述绿色子像素区域对应，用以将所述第三发光器件发出的光转换为绿光。
  2. 根据权利要求1所述的OLED显示面板，其中，所述第三发光器件为LED发光器件。
  3. 根据权利要求1所述的OLED显示面板，其中，所述第三发光器件为蓝光OLED器件或白光OLED器件。
  4. 根据权利要求3所述的OLED显示面板，其中，所述蓝光OLED器件包括依次层叠设置的阳极层、空穴注入层、空穴传输层、蓝光发光层、电子传输层、电子注入层以及阴极层。
  5. 根据权利要求4所述的显示面板，其中，所述蓝光发光层包括至少两层层叠设置的蓝光发光子层，且相邻所述蓝光发光子层包含的发光主体材料不同。
  6. 根据权利要求4所述的显示面板，其中，所述蓝光发光层包括至少两种蓝光发光主体材料。
  7. 根据权利要求1所述的显示面板，其中，所述色转换层包括绿色荧光材料或绿色量子点材料。
  8. 根据权利要求1所述的显示面板，其中，所述OLED显示面板还包括第一黑色矩阵层，所述第一黑色矩阵层配置于所述红色子像素、绿色子像素以及蓝色子像素之间的间隙区域，且与所述色转换层同层设置。
  9. 根据权利要求8所述的显示面板，其中，在所述第一黑色矩阵层的间隙还包括对应所述蓝色子像素区域的第一蓝色色阻层，以及对应所述红色子像素区域的第一红色色阻层。
  10. 根据权利要求9所述的显示面板，其中，在所述第一黑色矩阵层的间隙对应所述蓝色子像素以及红色子像素的区域还设置有透明流平层，且在所述第一黑色矩阵层、透明流平层以及色转换层上还设置有第二色阻层，所述第二色阻层包括对应所述绿色子像素区域的第二绿色色阻层、对应所述蓝色子像素区域的第二蓝色色阻层以及对应所述红色子像素区域的第二红色色阻层。
  11. 根据权利要求1所述的显示面板，其中，所述色转换层掺杂有散射粒子。
  12. 一种显示装置，其中，所述显示装置包括OLED显示面板，所述OLED显示面板包括多个像素单元，所述像素单元包括红色子像素、绿色子像素以及蓝色子像素，所述OLED显示面板包括：
    基板；
    阵列驱动层，设置于所述基板上；
    发光器件层，设置于所述阵列驱动层上，包括配置于所述蓝色子像素区域发射蓝光的第一发光器件，配置于所述红色子像素区域发射红光的第二发光器件，以及配置于所述绿色子像素区域的第三发光器件；以及
    色转换层，设置于所述发光器件层上且与所述绿色子像素区域对应，用以将所述第三发光器件发出的光转换为绿光。
  13. 根据权利要求12所述的显示装置，其中，所述第三发光器件为蓝光OLED器件或白光OLED器件。
  14. 根据权利要求13所述的显示装置，其中，所述蓝光OLED器件包括依次层叠设置的阳极层、空穴注入层、空穴传输层、蓝光发光层、电子传输层、电子注入层以及阴极层。
  15. 根据权利要求14所述的显示装置，其中，所述蓝光发光层包括至少两层层叠设置的蓝光发光子层，且相邻所述蓝光发光子层包含的发光主体材料不同。
  16. 根据权利要求14所述的显示装置，其中，所述蓝光发光层包括至少两种蓝光发光主体材料。
  17. 根据权利要求12所述的显示面板，其中，所述色转换层包括绿色荧光材料或绿色量子点材料。
  18. 根据权利要求12所述的显示面板，其中，所述OLED显示面板还包括第一黑色矩阵层，所述第一黑色矩阵层配置于所述红色子像素、绿色子像素以及蓝色子像素之间的间隙区域，且与所述色转换层同层设置。
  19. 根据权利要求18所述的显示面板，其中，在所述第一黑色矩阵层的间隙还包括对应所述蓝色子像素区域的第一蓝色色阻层，以及对应所述红色子像素区域的第一红色色阻层。
  20. 根据权利要求19所述的显示面板，其中，在所述第一黑色矩阵层的间隙对应所述蓝色子像素以及红色子像素的区域还设置有透明流平层，且在所述第一黑色矩阵层、透明流平层以及色转换层上还设置有第二色阻层，所述第二色阻层包括对应所述绿色子像素区域的第二绿色色阻层、对应所述蓝色子像素区域的第二蓝色色阻层以及对应所述红色子像素区域的第二红色色阻层。
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