This application is a US National Stage of International Application No. PCT/CN2019/082758, filed on Apr. 15, 2019, which claims priority to Chinese Patent Application No. 201810571147.4, filed with Chinese Patent Office on May 31, 2018, entitled “Flexible display device”, the entire content of which is incorporated herein by reference.

FIELD

The present disclosure relates to the technical field of display, in particular to a flexible display device.

BACKGROUND

Flexible display devices are display devices which are made of flexible materials and are flexible. Due to the excellent display characteristics such as flexibility and lightness, the flexible display devices can be applied to many fields such as wearable devices, mobile devices and augmented reality and virtual technology devices and are considered to be the mainstream in future display fields.

Flexible display devices are usually made into a structure that can be rolled up or folded in a non-operating state and unfolded during operation. However, substrate materials of the flexible display devices are liable to be damaged during a manual rolling-up/folding process, and after long-term folding/rolling-up storage, problems such as irreversible deformation, creasing or warping also occur, which lead to unevenness after the substrate materials are unfolded, thus display effects of displays are affected. Meanwhile, the unevenness of substrates also affects the working characteristics and the service life of internal structures of the displays, and therefore the reliability of the displays is reduced.

SUMMARY

The present disclosure provides a flexible display device. The specific solution is as follows.

The flexible display device includes:

a flexible substrate; and

a flexiblity-rigidity transformation layer disposed on one side of the flexible substrate, where,

the flexiblity-rigidity transformation layer includes an electrode layer and a transformation film capable of transforming between a flexiblity state and a rigidity state under the action of an electric field; and the electrode layer is used for generating the electric field for driving the transformation film to transform between the flexiblity state and the rigidity state.

The present disclosure provides the flexible display device. The above flexible display device includes the flexible substrate and the flexiblity-rigidity transformation layer formed on one side of the flexible substrate. The flexiblity-rigidity transformation layer includes the transformation film and the electrode layer. Specifically, after the electrode layer generates the electric field for transforming the transformation film from the flexiblity state to the rigidity state, the transformation film stretches in a direction perpendicular to the electric field, the elastic modulus changes, a film layer stretches and is paved flatly, and since the flexiblity-rigidity transformation layer is formed on the flexible substrate, the flexible substrate is paved flatly correspondingly, and thus the effect of flattening the flexible substrate can be achieved. In addition, the transformation film in the electric field can be transformed from the rigidity state to the flexiblity state by adjusting the electrode layer, then the flexible substrate loses support, and thus a user need of rolling-up or bending the flexible display device can be met. In addition, elastic parameters of the transformation film can be changed under the action of the electric field, and the transformation film is changed from the flexible layer to the rigid layer, so that planarization of the flexible substrate is achieved. Through transformation of the transformation film, damage of the flexible substrate during repeated rolling-up and unfolding processes can be reduced, so that the service life of the display device is prolonged, and the display quality is improved.

