Organic light-emitting display device and preparation method thereof

Abstract

The invention relates to an organic light-emitting display device and a preparation method thereof. The device comprises a substrate, a thin film transistor, a first organic insulating layer, an anodeand a second organic insulating layer, wherein the thin film transistor is formed on the substrate; the first organic insulating layer is formed on the thin film transistor; the anode is formed on the first organic insulating layer and comprises a first anode metal layer, a second anode metal layer and a third anode metal layer which are sequentially formed on the first organic insulating layer,the first anode metal layer is formed in a light-emitting region and a through hole, and the reflectivity of the first anode metal layer is lower than the reflectivity of the second anode metal layerand the reflectivity of the third anode metal layer; and the second organic insulating layer is formed on the anode. The second anode metal layer and the third anode metal layer which are arranged onthe upper layer of the anode and have relatively high reflectivity are removed, and only the first anode metal layer with relatively low reflectivity is remained in the through hole, so that the lightreflected by the anode at the through hole is reduced, the intensive reflection of the light at the through hole is avoided, the local light emitting abnormity is effectively avoided, and the displayeffect is better.

Description

technical field [0001] 本发明涉及有机发光显示制造技术领域,特别是涉及有机发光显示装置及其制备方法。 Background technique [0002] OLED(Organic Light-Emitting Diode,有机发光二极管)显示屏具有自发光、超轻薄、响应速度快、视角宽、功耗低等优点,被认为是最具有潜力的显示器件。 [0003] AMOLED(Active-matrix organic light emitting diode,有源矩阵有机电致发光器件)能够充分发挥OLED(Organic Light-Emitting Diode,有机发光二极管)工艺简单、发光效率高、轻薄、色彩丰富以及视角宽等诸多优点,既可以在大尺寸显示器方面有所应有,也可以在微显示器方面发挥潜力。 [0004] AMOLED显示器件中,由于有机发光层自发光是朝各个方向发光,发光方向不受控制、不能通过自身调整,所以光线在照射到反射率高的表面会产生反射,比如阳极的表面会产生反射。传统的AMOLED的阳极层经由过孔与下层金属层连接,过孔位置的阳极呈现凹陷,在阳极凹陷的位置产生的反射较为集中,使得在阳极凹陷的位置产生异常发光,造成显示不良。 Contents of the invention [0005] 基于此,有必要提供一种有机发光显示装置及其制备方法。 [0006] 一种有机发光显示装置,所述有机发光显示装置具有发光区域,有机发光显示装置包括: [0007] Substrate; [0008] 形成于所述基板上的薄膜晶体管,所述薄膜晶体管包括源 / 漏极; [0009] 形成于所述薄膜晶体管上的第一有机绝缘层,所述第一有机绝缘层在所述源 / 漏极对应的位置开设有过孔; [0010] 形成于所述第一有机绝缘层上的阳极,所述阳极包括依次形成于所述第一有机绝缘层上的第一阳极金属层、第二阳极金属层以及第三阳极金属层,所述第二阳极金属层与所第三阳极金属层形成于所述发光区域内,所述第一阳极金属层形成于发光区域内以及过孔内,所述第一阳极金属层通过所述过孔与所述源 / 漏极连接,其中,所述第一阳极金属层的反射率低于所述第二阳极金属层的反射率,所述第三阳极金属层用于透光; [0011] 形成于所述阳极上的第二有...

AI Technical Summary

Problems solved by technology

The anode layer of a traditional AMOLED is connected to the lower metal layer through a via hole, and the anode at the via hole position is concave, and the reflection generated at the concave position of the anode is relatively concentrated, resulting in abnormal light emission at the concave position of the anode, resulting in poor display

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