CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit of and priority to Chinese Patent Application No. 201910569139.0 filed Jun. 27, 2019, the contents of which are incorporated by reference in their entirety herein.

TECHNICAL FIELD

The present disclosure generally relates to the field of display technology and, more particularly, to a display device, a stretchable display panel, and a method for manufacturing the stretchable display panel.

BACKGROUND

At present, flexible display panels have gained extensive attention. Flexible display panels may be used in wearable devices, such as watches to adapt to body movements, or used in products such as electronic papers since they are deformable, e.g., stretchable and bendable.

Stretchable display panels are important research directions. An existing stretchable display panel is generally divided into a plurality of display units by apertures. The flexible display panel and the stretchable display panel may be stretched and thereby deformed due to the apertures.

It should be noted that the above-mentioned information disclosed in this part are provided only for acquiring a better understanding of the background of the present application and therefore, may include information that is not current technology already known to those of ordinary skill in the art.

SUMMARY

According to an aspect of the present disclosure, there is provided a stretchable display panel, comprising:

a stretchable display layer comprising a display area and a non-display area surrounding the display area;

a first elastic layer disposed on a side of the display layer and fixedly connected to the non-display area; and

a second elastic layer disposed on a side of the display layer distal to the first elastic layer, and fixedly connected to the non-display area;

wherein both the first elastic layer and the second elastic layer are transparent materials and have a Young's modulus greater than that of the display layer.

In an exemplary embodiment of the present disclosure, the stretchable display panel further comprises:

a first plastic frame sandwiched between the first elastic layer and the display layer, and located in the non-display area, the first plastic frame being in a ring-shape, wherein the first elastic layer is fixedly connected to the non-display area through the first plastic frame; and

a first filling portion filled in a space enclosed by the first plastic frame, and the first filling portion being liquid or solid having a Young's modulus is not greater than that of the display layer.

In an exemplary embodiment of the present disclosure, the stretchable display panel further comprises:

a second plastic frame sandwiched between the second elastic layer and the display layer, and located in the non-display area, the second plastic frame being in a ring-shape, wherein the second elastic layer is fixedly connected to the non-display area through the second plastic frame; and

a second filling portion filled in a space enclosed by the second plastic frame, and the second filling portion being liquid or solid having a Young's modulus not greater than that of the display layer.

In an exemplary embodiment of the present disclosure, the display area of the display layer comprises a plurality of display units that are spaced apart and through-holes between the display units, wherein the first filling portion or the second filling portion is filled in the through-holes.

In an exemplary embodiment of the present disclosure, the first filling portion and the second filling portion are solid and the first filling portion and the second filling portion have a Young's modulus not less than 5 Mpa and not more than 500 Mpa.

In an exemplary embodiment of the present disclosure, a material of the first filling portion and the second filling portion comprises at least one of polyvinyl chloride, acrylic, and polysulfide.

In an exemplary embodiment of the present disclosure, the first filling portion and the second filling portion are liquid and the first filling portion and the second filling portion have a viscosity not less than 10 cps and not more than 1000 cps.

In an exemplary embodiment of the present disclosure, a material of the first filling portion and the second filling portion comprises a lubricating oil.

In an exemplary embodiment of the present disclosure, the Young's moduli of the first elastic layer and the second elastic layer are not less than 500 Mpa and not more than 5000 Mpa.

In an exemplary embodiment of the present disclosure, a material of the first elastic layer comprises at least one of polydimethylsiloxane, polyurethane, rubber, and polysulfide; and

a material of the second elastic layer comprises at least one of polydimethylsiloxane, polyurethane, rubber, and polysulfide.

In an exemplary embodiment of the present disclosure, the first elastic layer and the second elastic layer have a thickness not less than 20 μm and not more than 200 μm; and the display layer has a thickness not less than 5 μm and not more than 20 μm.

According to an aspect of the present disclosure, there is provided a method for manufacturing a stretchable display panel, comprising:

providing a substrate and a stretchable display layer comprising a display area and a non-display area surrounding the display area;

forming a first elastic layer on the substrate, the first elastic layer being a transparent material and having a Young's modulus greater than that of the display layer;

providing the display layer on a side of the first elastic layer distal to the substrate, and the first elastic layer being fixedly connected to the non-display area;

forming a second elastic layer on a side of the display layer distal to the substrate, the second elastic layer being fixedly connected to the non-display area, and the second elastic layer being a transparent material and having a Young's modulus greater than that of the display layer; and

peeling off the substrate from the first elastic layer.

In an exemplary embodiment of the present disclosure, providing the display layer on a side of the first elastic layer distal to the substrate, and the first elastic layer being fixedly connected to the non-display area, comprises:

forming a ring-shaped first plastic frame on a surface of the first elastic layer distal to the substrate, the first plastic frame being located in the non-display area;

filling a first filling portion in the first plastic frame, the first filling portion being liquid or solid having a Young's modulus not greater than that of the display layer;

providing the display layer on a surface of the first plastic frame distal to the substrate, wherein the first elastic layer is fixedly connected to the non-display area through the first plastic frame;

forming the second elastic layer on a side of the display layer distal to the substrate, the second elastic layer being fixedly connected to the non-display area, comprises:

forming a ring-shaped second plastic frame on a surface of the display layer distal to the substrate, the second plastic frame being located in the non-display area;

filling a second filling portion in the second plastic frame, the second filling portion being liquid or solid having a Young's modulus not greater than that of the display layer;

forming a second elastic layer on a side of the second plastic frame distal to the substrate, the second elastic layer being fixedly connected to the non-display area through the second plastic frame.

In an exemplary embodiment of the present disclosure, providing the display layer on a side of the first elastic layer distal to the substrate, and the first elastic layer being fixedly connected to the non-display area, comprises:

forming a ring-shaped first plastic frame on a surface of the first elastic layer distal to the substrate, the first plastic frame being located in the non-display area;

providing the display layer on a surface of the first plastic frame distal to the substrate, wherein the first elastic layer is fixedly connected to the non-display area through the first plastic frame;

forming the second elastic layer on a side of the display layer distal to the substrate, the second elastic layer being fixedly connected to the non-display area, comprises:

forming a ring-shaped second plastic frame on a surface of the display layer distal to the substrate, the second plastic frame being located in the non-display area, and the second plastic frame having a notch;

forming a second elastic layer on a surface of the second plastic frame distal to the substrate, the second elastic layer being fixedly connected to the non-display area through the second plastic frame;

before peeling off the substrate from the first elastic layer, after forming the second elastic layer on the surface of the second plastic frame distal to the substrate, the method further comprises:

injecting a transparent liquid filler into the notch, wherein a portion of the transparent filler filled in the first plastic frame is a first filling portion and a portion of the filler filled in the second plastic frame is a second filling portion; and

blocking the notch.

According to an aspect of the present disclosure, there is provided a display device comprising the stretchable display panel according to any one of the above described.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

