OLED (organic light emitting diode) display

Abstract

The invention provides an OLED (organic light emitting diode) display. A thin film packaging layer of the OLED display comprises inorganic passivation layers, organic buffer layers and moisture / oxygen quenching layers. Stacking structures are jointly formed by the inorganic passivation layers and the organic buffer layers, and each moisture / oxygen quenching layer is a first moisture / oxygen quenching layer positioned between the corresponding stacking structure and an OLED layer or a second moisture / oxygen quenching layer positioned between the two corresponding inorganic passivation layers in the corresponding stacking structure or a combination of the first moisture / oxygen quenching layer and the second moisture / oxygen quenching layer. The OLED display has the advantages that damage of OLED devices due to moisture / oxygen can be effectively prevented by means of physical adsorption or chemical reaction under synergistic effects of the moisture / oxygen quenching layers, the inorganic passivation layers and the organic buffer layers in the thin film packaging layer on the premise that the light emitting performance of the OLED devices is unaffected, accordingly, the service lives of the OLED devices can be prolonged, and effects of releasing stress of the inorganic passivation layers further can be realized; the numbers of layers of the thin film packaging layer and the thickness of the thin film packaging layer are reduced, accordingly, the thickness of the OLED display can be integrally reduced, and the bending performance of the flexible OLED display can be enhanced.

Description

technical field [0001] The invention relates to the technical field of flat panel display, in particular to an OLED display. Background technique [0002] Organic light emitting diode (OLED) has many excellent characteristics such as self-illumination, low energy consumption, wide viewing angle, rich color, fast response, and flexible screen preparation, which has aroused great interest in the scientific research and industry circles, and is considered It is a next-generation display technology with great potential. [0003] Currently, OLED screens widely used in the display field usually adopt a top-emitting device structure. OLED devices are composed of an anode, an organic layer and a cathode. The anode is usually indium tin oxide (ITO) with high work function and high reflectivity. Composed of ITO / Ag / ITO three-layer stacked structure with silver (Ag), the organic layer includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport...

AI Technical Summary

Problems solved by technology

[0005] like figure 2 As shown, usually in the film-forming process of TFE layer, can inevitably introduce a small amount of particle (particle), cause inorganic thin film 22 to produce defect (void, micro-crack etc.)

In addition, in the subsequent manufacturing process, or during the use of the screen (external impact, bending, falling), the inorganic thin film 22 in the TFE layer may generate new defects or increase the original defects.

And these defects will become channels for water and oxygen to penetrate, reduce the water resistance of the TFE layer, make water and oxygen in the atmospheric environment come into contact with OLED light-emitting devices, and affect the service life of OLED light-emitting devices

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