Flexible display device and method for preparing the same

Abstract

The invention, which relates to the field of the display technology, discloses a method for preparing a flexible display device. The method comprises: a flexible substrate is divided into a pixel region and a non-pixel region; a rigid buffer layer and a driving circuit layer that are stacked are formed in the pixel region successively; a flexible first isolation layer covering both the pixel region and the non-pixel region is formed on the driving circuit layer; a connection layer is formed on the first isolation layer; a flexible second isolation layer only covering the non-pixel region is formed on the connection layer; a light-emitting device layer and a rigid encapsulation layer that are stacked are formed in the pixel region on the connection layer successively; and a flexible cover plate is formed. According to the preparation method, the rigid buffer layer and the driving circuit layer are only formed in the pixel region, the flexible first isolation layer, the connection layerand the flexible second isolation layer are only formed in the non-pixel region, and thus the stress mainly is connected in the non-pixel region. Therefore, the flexible bending effect is good; a phenomenon that the device characteristics are changed due to bending is avoided; and the reliability and the use effect of the flexible display device are improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a flexible display device and a preparation method thereof. Background technique [0002] At present, the successful mass production of flexible displays is not only beneficial to the new generation of high-end smartphone industry, but also has a profound impact on the application of wearable devices due to its low power consumption and bendable characteristics. And in the future development, flexible screens will be widely used with the continuous penetration of personal smart terminals. [0003] Organic light-emitting functional materials for flexible displays are very sensitive to water and oxygen. Therefore, packaging technology is one of the key technologies for flexible displays. Existing methods for preparing flexible displays such as figure 1 As shown, it mainly includes the following steps: first prepare a layer of inorganic barrier layer 2' on the flexible substrate ...

AI Technical Summary

Problems solved by technology

For the flexible display prepared by the above method, since the inorganic barrier layer is a rigid film, the elastic modulus is small, and the bending deformation is small, so it is difficult to achieve a small bending radius

This leads to an increase in the bending strength of the entire screen and reduces the overall bending deformation of the screen

At the same time, because the barrier layer is usually an inorganic material, the film-forming property is poor, and it is easy to form defects such as pinholes and cracks. When the screen body is bent, the defect area is easy to induce cracks and even cause the film to break, which in turn affects the reliability of the package. The effect of the display

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