Flexible OLED display device and preparation method thereof

Abstract

The invention provides a flexible OLED display device and a preparation method thereof. The flexible OLED display device comprises a first flexible barrier film, a flexible substrate, a TFT layer, anOLED light emitting layer, a thin film packaging member and a second flexible barrier film, wherein the thin film packaging member comprises at least two nano inorganic layers and at least one organiclayer, the organic layers and the nano inorganic layers are alternately laminated and the organic layers are located between two adjacent nano inorganic layers. The invention provides the flexible OLED display device and the preparation method thereof, an inorganic barrier film formed by stacking single nano inorganic layers of equal thicknesses is introduced into an organic-inorganic multilayerfilm packaging structure, the OLED device with small bending curvature radius can be prevented from generating cracks during bending, the OLED device can obtain higher water vapor barrier performance,and the service life of the flexible OLED display device is further improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a flexible OLED display device and a preparation method. Background technique [0002] At present, flexible OLED (organic electroluminescent device) display devices have the advantages of thinness, bendability, and low power consumption, and have broad application prospects in smart home appliances and wearable devices. However, the organic light-emitting layer of OLED is very sensitive to water and oxygen, which affects its light-emitting performance, so the packaging structure and materials are very important. For flexible OLED display devices, the bending radius of curvature is very small, so the requirements for packaging reliability are higher. The existing packaging methods for flexible OLEDs are mostly organic-inorganic multi-layer film packaging, and the bending radius of curvature is generally above 3mm. , the organic-inorganic multi-layer film packaging method has a h...

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Problems solved by technology

[0004] The invention provides a flexible OLED display device and a preparation method, which can prevent OLED devices with small bending radii from cracking during the bending process, so as to solve the problem of existing flexible OLED display devices due to the problem of encapsulation with organic-inorganic multilayer thin films. The thickness of the film layer is relatively large, which leads to the OLED device with a small bending radius is prone to cracks during the bending process, which reduces the packaging effect and further leads to the technical problem of OLED device failure

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