CN204130537U - A kind of OLED panel and display unit - Google Patents

The utility model relates to a kind of oled panel and display unit, wherein oled panel comprises substrate and is successively set on anode layer, organic luminous layer, the cathode layer on substrate, and described substrate is provided with multiple groove formation lens arra near the one side of described anode layer.The beneficial effects of the utility model are: the arranging of lens arra is reduced the light that sends of organic luminous layer, between described anode layer and described substrate and between described substrate and air, total reflection occurred, and increases the utilance of the light that organic luminous layer sends.

一种 OLED 面板及显示装置A kind of OLED panel and display device

技术领域technical field

本实用新型涉及有机光电器件制备领域，尤其涉及一种OLED面板及显示装置。The utility model relates to the field of preparation of organic photoelectric devices, in particular to an OLED panel and a display device.

背景技术Background technique

OLED(Organic Light-Emitting Diode)技术是近几年比较热门的前瞻技术，OLED器件以其自发光，高对比度、宽视角、高相应速度等特点越来越受到人们的重视，成为理想的下一代显示器件。然而OLED也有自身的一些问题，比如，OLED的耦合出光效率只在20％以下，浪费了大量的光子。因此提高OLED器件的耦合出光效率至关重要。OLED (Organic Light-Emitting Diode) technology is a popular forward-looking technology in recent years. OLED devices have attracted more and more attention due to their self-luminescence, high contrast, wide viewing angle, and high response speed, and have become the ideal next-generation display device. However, OLED also has its own problems. For example, the outcoupling efficiency of OLED is only below 20%, wasting a lot of photons. Therefore, it is very important to improve the outcoupling efficiency of OLED devices.

一般情况下OLED面板的光输出模式是如图1所示，由于有机发光层3的折射率与阳极层2的折射率接近，因而由有机发光层3产生的光可以直接通过阳极层2，由于基板1的折射率约为1.5，小于阳极层2的折射率，因而光线会在阳极层2和基板之间的界面上发生全发射现象(如第一光线a所示)，造成大量光线不能射出OLED器件，即使接近临界反射角的透射光线，由于基板1折射率大于空气，光线也会在基板1和空气界面上发生全反射(如第二光线b所示)，同样滞留了大量的光线。这些被滞留在OLED器件内部的光子占到所有产出光子的80％～85％，所以造成了OLED器件的外部量子效率(EQE)非常低。In general, the light output mode of an OLED panel is as shown in Figure 1. Since the refractive index of the organic light-emitting layer 3 is close to that of the anode layer 2, the light generated by the organic light-emitting layer 3 can directly pass through the anode layer 2. The refractive index of the substrate 1 is about 1.5, which is smaller than the refractive index of the anode layer 2, so the light will be fully emitted at the interface between the anode layer 2 and the substrate (as shown by the first light a), causing a large amount of light to fail to exit In an OLED device, even if the transmitted light is close to the critical reflection angle, since the refractive index of the substrate 1 is greater than that of the air, the light will be totally reflected on the interface between the substrate 1 and the air (as shown by the second light b), and a large amount of light will also be retained. These photons trapped inside the OLED device account for 80% to 85% of all output photons, so the external quantum efficiency (EQE) of the OLED device is very low.

实用新型内容Utility model content

为了解决上述技术问题，本实用新型提供一种OLED面板及显示装置，增大有机发光层发出的光线的利用率。In order to solve the above technical problems, the utility model provides an OLED panel and a display device, which increase the utilization rate of the light emitted by the organic light-emitting layer.

为了达到上述目的，本实用新型采用的技术方案是：一种OLED面板，包括基板以及依次设置在基板上的阳极层、有机发光层、阴极层，所述基板靠近所述阳极层的一面上设有多个凹槽形成透镜阵列。In order to achieve the above purpose, the technical solution adopted by the utility model is: an OLED panel, including a substrate and an anode layer, an organic light-emitting layer, and a cathode layer arranged on the substrate in sequence, and the side of the substrate close to the anode layer is provided with There are a plurality of grooves forming a lens array.

进一步的，所述凹槽为弧面形成的半球形结构。Further, the groove is a hemispherical structure formed by an arc surface.

进一步的，所述基板和所述阳极层之间设有折射率与所述阳极层的折射率相同的有机层。Further, an organic layer having the same refractive index as that of the anode layer is provided between the substrate and the anode layer.

进一步的，所述阳极层的折射率为1.8，且所述有机发光层与所述阳极层的折射率相同。Further, the refractive index of the anode layer is 1.8, and the organic light-emitting layer and the anode layer have the same refractive index.

进一步的，所述基板的折射率为1.5。Further, the refractive index of the substrate is 1.5.

本实用新型还提供一种显示装置，包括上述的OLED面板。The utility model also provides a display device, including the above-mentioned OLED panel.

本实用新型的有益效果是：透镜阵列的设置减少有机发光层发出的光线在所述阳极层与所述基板之间和所述基板与空气之间发生全反射，增大了有机发光层发出的光线的利用率。The beneficial effect of the utility model is: the arrangement of the lens array reduces the total reflection of the light emitted by the organic light-emitting layer between the anode layer and the substrate and between the substrate and the air, and increases the light emitted by the organic light-emitting layer. Light utilization.

附图说明Description of drawings

图1表示现有技术中OLED面板的结构示意图；FIG. 1 shows a schematic structural view of an OLED panel in the prior art;

图2表示本实用新型一实施例中OLED面板结构示意图；Fig. 2 shows the structure diagram of OLED panel in one embodiment of the utility model;

图3表示本实用新型一实施例中OLED面板结构示意图。FIG. 3 is a schematic diagram showing the structure of an OLED panel in an embodiment of the present invention.

具体实施方式Detailed ways

以下结合附图对本实用新型的结构和原理进行详细说明，所举实施例仅用于解释本实用新型，并非以此限定本实用新型的保护范围。The structure and principle of the utility model will be described in detail below in conjunction with the accompanying drawings. The examples given are only used to explain the utility model, and are not intended to limit the protection scope of the utility model.

如图2所示，本实施例提供一种OLED面板，包括基板1以及依次设置在基板1上的阳极层2、有机发光层3、阴极4层，所述基板1靠近所述阳极层2的一面上设有多个凹槽形成透镜阵列。As shown in FIG. 2 , this embodiment provides an OLED panel, including a substrate 1 and an anode layer 2, an organic light-emitting layer 3, and a cathode layer 4 sequentially arranged on the substrate 1. The substrate 1 is close to the anode layer 2. A plurality of grooves are arranged on one side to form a lens array.

透镜阵列的设置，会汇聚到达基板1的界面上的光线，使原本在此界面上发生全反射的一部分光线(光线c)能够顺利通过界面，进入基板1内，由于对光线发生了汇聚，也缩小了基板1与空间界面上的光线入射角，能够使光线顺利透出OLED器件(如光线d)，提高OLED器件的总体外部量子效率。The arrangement of the lens array will converge the light rays reaching the interface of the substrate 1, so that a part of the light rays (light c) that was totally reflected on the interface can pass through the interface smoothly and enter the substrate 1. The incident angle of light on the interface between the substrate 1 and the space is reduced, enabling the light to pass through the OLED device (such as light d) smoothly, and improving the overall external quantum efficiency of the OLED device.

透镜阵列的设置减少有机发光层3发出的光线在所述阳极层2与所述基板1之间和所述基板1与空气之间发生全反射，减少了光线在OLED面板内的滞留，增大了有机发光层3发出的光线的利用率。The arrangement of the lens array reduces the total reflection of the light emitted by the organic light-emitting layer 3 between the anode layer 2 and the substrate 1 and between the substrate 1 and the air, reduces the retention of light in the OLED panel, and increases The utilization rate of the light emitted by the organic light-emitting layer 3 is improved.

优选的，所述凹槽为弧面形成的半球形结构。应当理解的是，所述凹槽结构并不以此为限，只要起到汇聚光线的作用，所述凹槽的结构还可以采用斜面形成的锥形结构等。Preferably, the groove is a hemispherical structure formed by an arc surface. It should be understood that the structure of the groove is not limited thereto, as long as it plays a role of converging light, the structure of the groove may also adopt a tapered structure formed by an inclined surface.

优选的，所述基板1和所述阳极层2之间设有折射率与所述阳极层2的折射率相同的有机层5。Preferably, an organic layer 5 having the same refractive index as that of the anode layer 2 is provided between the substrate 1 and the anode layer 2 .

有机层5的折射率与阳极层2和有机发光层3的折射率相一致，这样有机发光层3产生的光线就会直接通过有机层5。由于基板1上面设置的透镜阵列，在基板1上形成透镜阵列的表面沉积的有机层5自动就会生成透镜阵列，如图3所示，在有机层5靠近基板1的表面上形成有与基板1上凹槽相适配的凸起，以在有机层5相应的表面形成透镜阵列，这些透镜阵列会汇聚到达有机层5与基板1的界面上的光线，使原本在此界面上发生全反射的一部分光线(光线f)能够顺利通过界面(有一部分光线仍然后发生全反射，而不能进入基板1内部)，进入玻璃基板1内，由于对光线发生了汇聚，也缩小了玻璃基板1与空间界面上的光线入射角，能够使光线顺利透出OLED器件(光线e)，提高OLED器件的总体外部量子效率。同时，由于有机层5的插入，改善了OLED器件对水氧的阻挡能力，提升OLED器件的寿命。The refractive index of the organic layer 5 is consistent with the refractive index of the anode layer 2 and the organic light-emitting layer 3 , so that the light generated by the organic light-emitting layer 3 will directly pass through the organic layer 5 . Due to the lens array arranged on the substrate 1, the organic layer 5 deposited on the surface of the lens array on the substrate 1 will automatically generate a lens array. 1, the grooves are adapted to form a lens array on the corresponding surface of the organic layer 5, and these lens arrays will converge the light that reaches the interface between the organic layer 5 and the substrate 1, so that total reflection occurs on the interface Part of the light (light f) can pass through the interface smoothly (a part of the light still undergoes total reflection and cannot enter the interior of the substrate 1) and enters the glass substrate 1. Due to the convergence of the light, the space between the glass substrate 1 and the space is also reduced. The incident angle of light on the interface can make the light pass through the OLED device smoothly (light e) and improve the overall external quantum efficiency of the OLED device. At the same time, due to the insertion of the organic layer 5, the barrier ability of the OLED device to water and oxygen is improved, and the service life of the OLED device is improved.

由于有机层5的折射率大于基板1的折射率，只要进入基板1的光线的入射角大于预设角度(临界角)则会在基板1内发生全反射，而使得光线无法射出基板1，所以为了最大程度的利用有机发光层3发出的光线。减少光线在基板1界面全反射的发生，所述凹槽的截面为弧形形结构时，其曲率半径优选小于23um，所述凹槽结构的宽度d优选为小于20um，所述凹槽结构的深度h优选为小于10um，但并不以此为限。Since the refractive index of the organic layer 5 is greater than the refractive index of the substrate 1, as long as the incident angle of the light entering the substrate 1 is larger than the preset angle (critical angle), total reflection will occur in the substrate 1, so that the light cannot exit the substrate 1, so In order to utilize the light emitted by the organic light-emitting layer 3 to the greatest extent. To reduce the occurrence of total reflection of light at the interface of the substrate 1, when the cross section of the groove is an arc-shaped structure, its radius of curvature is preferably less than 23um, the width d of the groove structure is preferably less than 20um, and the groove structure The depth h is preferably less than 10um, but not limited thereto.

优选的，所述阳极层2的折射率为1.8，且所述有机发光层3与所述阳极层2的折射率相同。实际制作过程中，有机发光层3的折射率与阳极层2的折射率相近，有机发光层3产生的光可以直接通过阳极层2。Preferably, the refractive index of the anode layer 2 is 1.8, and the organic light emitting layer 3 and the anode layer 2 have the same refractive index. In the actual manufacturing process, the refractive index of the organic light-emitting layer 3 is close to that of the anode layer 2 , and the light generated by the organic light-emitting layer 3 can directly pass through the anode layer 2 .

优选的，所述基板1的折射率为1.5，但并不以此为限。Preferably, the refractive index of the substrate 1 is 1.5, but not limited thereto.

本实用新型还提供一种显示装置，包括上述的OLED面板。The utility model also provides a display device, including the above-mentioned OLED panel.

以下具体介绍本实施例中OLED面板的制作方法。The method for fabricating the OLED panel in this embodiment will be described in detail below.

OLED面板的制作方法包括以下步骤：The manufacturing method of the OLED panel includes the following steps:

在基板1的一表面上设置多个凹槽形成透镜阵列；A plurality of grooves are arranged on a surface of the substrate 1 to form a lens array;

在基板1上形成有透镜阵列的表面上形成有机层5的图形，有机层5的折射率与阳极层2的折射率相同；A pattern of an organic layer 5 is formed on the surface of the substrate 1 on which the lens array is formed, and the refractive index of the organic layer 5 is the same as that of the anode layer 2;

在有机层5上形成阳极层2的图形；Forming the pattern of the anode layer 2 on the organic layer 5;

在阳极层2上形成有机发光层3的图形；Forming the pattern of the organic light-emitting layer 3 on the anode layer 2;

在有机发光层3上形成阴极4层的图形。On the organic light-emitting layer 3, the pattern of the cathode 4 layer is formed.

进一步的，在阳极层2上形成有机发光层3的图形的步骤中具体包括：Further, the step of forming the pattern of the organic light-emitting layer 3 on the anode layer 2 specifically includes:

在阳极层2上依次形成空穴注入层和空穴传输层；A hole injection layer and a hole transport layer are sequentially formed on the anode layer 2;

在空穴传输层上形成像素发光层；forming a pixel light emitting layer on the hole transport layer;

在像素发光层上形成电子传输层；forming an electron transport layer on the pixel light emitting layer;

在电子传输层上形成电子注入层。An electron injection layer is formed on the electron transport layer.

以上所述为本实用新型较佳实施例，应当指出的是，对于本领域普通技术人员来说，在不脱离本实用新型的所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本实用新型保护范围。The above is a preferred embodiment of the utility model, it should be pointed out that for those skilled in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements And retouching should also be regarded as the protection scope of the present utility model.