A kind of flexible OLED display panel and preparation method thereof

Abstract

The invention provides a flexible OLED display panel, which comprises a PI layer, and a light-emitting area and a bending area are arranged on the PI layer. Wherein the light emitting area includes a first light emitting area and a second light emitting area, and the bending area is arranged between the first light emitting area and the second light emitting area. Wherein the first light-emitting region and the second light-emitting region both include TFT layers arranged on the PI layer, each TFT layer is provided with an OLED device layer and a thin film encapsulation layer arranged thereon, and the bending region It includes a bending layer arranged on the PI layer. Wherein the bending area is only provided with a bending layer for bending, but not a water-blocking layer in the thin film encapsulation layer, so there is no water-blocking layer in it due to its own multiple bending. The water-blocking layer has crack defects.

Description

technical field [0001] The invention relates to the technical field of light-emitting display, in particular, a flexible OLED display panel and a preparation method thereof. Background technique [0002] It is known that with the continuous development of flexible OLED display panel technology, flexible and foldable products have gradually entered the market, and because of their foldable performance, the display panel can be adjusted in size and unfolded when needed. Large; when not in use, it can be folded and placed with a small storage space, which makes it a trend to become the mainstream of the market. [0003] At present, small-sized flexible OLED panels are gradually matured and mass-produced, but they cannot be repeatedly folded with a small radius of curvature. Moreover, for foldable OLEDs, the radius of curvature at the folds is very small, therefore, this puts forward higher requirements for the packaging of small-sized flexible OLED panels. [0004] Further, t...

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Problems solved by technology

[0005] Moreover, for a folded OLED with a radius of curvature less than 1mm, if the folded area is located in the light-emitting area, that is, the substrate in the folded area is provided with a TFT layer and an OLED device layer, then when the barrier layer of the folded area is caused by the When the folding area is bent many times to generate cracks, the external water vapor can quickly penetrate into the panel through the encapsulation layer through these cracks, and then invade into the TFT layer and OLED device layer, which will make the TFT and OLED devices therein face Severe test, in severe cases, even make the function of the device invalid

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